One of the recent, important changes in higher education relates to

A．Both private employers and government employers discriminate, with equal effects on women's earnings.
B．If private employers and government employers discriminate, the discrimination by private employers has a greater effect on women's earnings.
C．Private employers discriminated it is possible that government employers discriminate.
D．Private employers discriminate; government employers do not discriminate.

A．the future usefulness of the knowledge obtained in college.
B．the missions of different educational institutions in America.
C．the purpose of American postsecondary education in the past.
D．the history of the development of American higher education.