EXISTING AND NEW ONE-FAMILY HOMES* SOLD IN THE UNITED STATES FROM 1970 TO 1982 AND THE MEDIAN SALE PRICE FOR SELECTED YEARS
* All references to homes in the data and test questions should be interpreted as one-family homes.
Note: Graphs drawn to scale.
The following 3 question refer to the data above.
For which of the following years was there an increase over the previous year in the number of existing homes sold, but a decrease in the number of new homes sold？

A. 1972
B. 1973
C. 1974
D. 1977
E. 1979