What does the fourth paragraph mainly talk about?A.It continues to analyze the problems.B.
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What does the fourth paragraph mainly talk about?
A.It continues to analyze the problems.
B.It confirms the seriousness of the problem.
C.It introduces the background of American universities.
D.It shows challenges universities are confronted with.
请帮忙给出正确答案和分析,谢谢!
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