PITH:
A. illogical idea
B. preceding report
C. flawed statement
D. questionable proof
E. inconsequential portion
Which of the hypothetical discoveries would MOST likely shed doubt on the author's claim that "field regeneration" could be responsible for the earth's magnetic reversals
A. Extreme fluctuations in the dynamo processes are discovered to be exceedingly rare, if they occur at all.
B. Magnetic field lines are discovered to diffuse very poorly through the earth's outer core.
C. Realignment of the earth's magnetic polarity is discovered to occur much more frequently than was previously believed.
D. Molten iron is discovered to be a poorer electrical conductor than was previously believed.
E. The earth's core is found to move at a much faster rate than had previously been measured.
The author refers to the increase in animal bones in the fourth paragraph primarily in order to
A. demonstrate the increase of the availability of grazing mammals during the desiccation of the African landscape
B. suggest a reason why robust proto-humans eventually failed in the competition with Homo for animal prey
C. provide proof that environmental changes did indeed occur around a time of rapid evolution for Homo
D. explain the means by which Homo was able to make use of the appearance of the antelope and gazelle
E. offer evidence that with the desiccation of the African landscape, Homo's diet changed from that of the australopithecine
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