Which of the Following Is True of College Attainment in the United

Which of the following is true of college attainment in the United States?

A) With higher levels of college enrollment, college attainment levels have increased accordingly.
B) Despite higher levels of college enrollment, college attainment levels have remained flat.
C) Six-year completion rates are lowest at the most selective schools.
D) Six-year completion rates are highest at open-admission schools.