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The fire that destroyed the Municipal Building started before dawn this morning, and the last fire fighters did not leave until late this afternoon. No one could have been anywhere in the vicinity of a fire like that one and fail to notice it. Thomas must have seen it, whatever he now says to the contrary. He admits that, as usual, he went from his apartment to the library this morning, and there is no way for him to get from his apartment to the library without going past the Municipal Building. The main conclusion of the argument is that

A. Thomas was in the vicinity of the fire this morning.
B. Thomas claimed not to have seem the fire.
C. Thomas saw the fire this morning.
D. Thomas went directly from his apartment to the library this morning.
E. (E) Thomas went by the Municipal Building this morning.

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Forty-five percent of all blood donated in the United States is type O. Type O blood is essential for emergencies where there is no time for determining the blood type of victims because type O blood can be used for everyone. Type O blood is unique in that it is compatible with blood of all types: any recipient, regardless of blood type, can be given it. But precisely because of this special usefulness, type O blood is chronically in short supply. If the statements in the passage above are true, which of the following must also be true

A. The special usefulness of type O blood lies in the fact that it matches the blood type of most people.
B. Supplies of type O blood are continuously so low that type O blood is unavailable for emergencies, where its usefulness would be greatest.
C. Forty-five percent of the total population of the United State has type O blood, which makes type O the most common blood type.
D. Any decision to give blood of any type other than O needs to be based on knowledge of the recipient’s blood type.
E. (E) Type O blood is the only blood that cannot be typed as fast as needed in emergencies.

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Some of the world’s most beautiful cats are Persian cats. However, it must be acknowledged that all Persian cats are pompous, and pompous cats are invariably irritating. If the statements above are true, each of the following must also be true on the basis of them EXCEPT:

A. Some of the world’s most beautiful cats are irritating.
B. Some irritating cats are among the world’s most beautiful cats.
C. Any cat that is not irritating is not a Persian cat.
D. Some pompous cats are among the world’s most beautiful cats.
E. (E) Some irritating and beautiful cats are not Persian cats.

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One method of dating the emergence of species is to compare the genetic material of related species. Scientists theorize that the more genetically similar two species are to each other, the more recently they diverged from a common ancestor. After comparing genetic material from giant pandas, red pandas, raccoons, coatis, and all seven bear species, scientists concluded that bears and raccoons diverged 30 to 50 million years ago. They further concluded that red pandas separated from the ancestor of today’s raccoons and coatis a few million years later, some 10 million years before giant pandas diverged from the other bears. Which one of the following can be properly inferred from the passage

A. Giant pandas and red pandas are more closely related than scientists originally thought they were.
B. Scientists now count the giant panda as the eighth species of bear.
C. It is possible to determine, within a margin of just a few years, the timing of divergence of various species.
D. Scientists have found that giant pandas are more similar genetically to bears than to raccoons.
E. (E) There is substantial consensus among scientists that giant pandas and red pandas are equally related to raccoons.

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Comets do not give off their own light but reflect light from other sources, such as the Sun. Scientists estimate the mass of comets by their brightness: the greater a comet’s mass, the more light that comet will reflect. A satellite probe, however, has revealed that the material of which Halley’s comet is composed reflects 60 times less light per unit of mass than had been previously thought. The statements above, if true, give the most support to which one of the following

A. Some comets are composed of material that reflects 60 times more light per unit of mass than the material of which Halley’s comet is composed.
B. Previous estimates of the mass of Halley’s comet which were based on its brightness were too low.
C. The total amount of light reflected from Halley’s comet is less than scientists had previously thought.
D. The reflective properties of the material of which comets are composed vary considerably from comet to comet.
E. (E) Scientists need more information before they can make a good estimate of the mass of Halley’s comet.

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A. Thomas was in the vicinity of the fire this morning. B. Thomas claimed not to have seem the fire. C. Thomas saw the fire this morning. D. Thomas went directly from his apartment to the library this morning. E. (E) Thomas went by the Municipal Building this morning.

Some of the world’s most beautiful cats are Persian cats. However, it must be acknowledged that all Persian cats are pompous, and pompous cats are invariably irritating. If the statements above are true, each of the following must also be true on the basis of them EXCEPT:

A. Thomas was in the vicinity of the fire this morning.
B. Thomas claimed not to have seem the fire.
C. Thomas saw the fire this morning.
D. Thomas went directly from his apartment to the library this morning.
E. (E) Thomas went by the Municipal Building this morning.