From the 1970s Through the 1990s,the Relative Price of a College

Multiple Choice

From the 1970s through the 1990s,the relative price of a college education has increased greatly.During the same time period,college enrollment has also increased.This evidence suggests that during this time period

A) the demand curve for a college education has shifted leftward.
B) the demand curve for a college education has shifted rightward.
C) the supply curve for a college education has shifted leftward.
D) the supply curve for a college education has shifted rightward.