Answer:
The evolution of college education in America shows that the biggest problem is getting students to graduate.
Explanation:
Tough describes the evolution of the college graduation rates in America.
While college graduation rates amongst people from the working class had grown throughout the 20th century, and by the 1990s the US had the highest college graduation rate in the world, in the last ten years college graduation rates in the US are not rising as much as before. Furthermore, college graduation rates have risen among wealthy students while it has fallen among those of low income.
