The text suggests one of the possible explanations for the declining strength of the relationship between higher levels of education and liberalism might be:
a. Colleges and universities have become more objective in their admissions decisions.
b. Professors are increasingly from the lower middle class.
c. There has been a decrease in students pursuing post-graduate degrees.
d. The standards for text book publication has become more rigorous.
e. The number of social science and humanities majors is declining
Answer: e