Which best summarizes the increase in costs at public four-year colleges over the past 30 years?
A
They have increased less than private four-year colleges and public two-year colleges.B
They have increased more than private four-year colleges but less than public two-year colleges.C
They have increased more than public two-year colleges but less than private four-year colleges.D
They have increased more than private four-year colleges and public two-year colleges.