59. Top college graduates are having more difficulty demonstrating their superiority to prospective employers than did the
top students of twenty years ago when an honors degree was distinction enough. Today's employers are less impressed with the
honors degree. Twenty years ago no more than 10 percent of a given class graduated with honors.
Today, however, because of grade inflation, the honors degree goes to more than 50 percent of a graduating class.
Therefore, to restore confidence in the degrees they award, colleges must take steps to control grade inflation.
Which one of the following is an assumption that, if true, would support the conclusion in the passage?
(A) Today’s students are not higher achievers than the students of twenty years ago.
(B) Awarding too many honors degrees causes colleges to inflate grades.
(C) Today’s employers rely on honors ranking in making their hiring decisions.
(D) It is not easy for students with low grades to obtain jobs.
(E) Colleges must make employers aware of the criteria used to determine who receives an honor degree.
答案为A选项。
不太明白答案在论证结论方面发挥的作用，所以想问下A选项是怎么作为assumption来确保conclusion 为true的？谢谢
因为只有这个成立才能得出结论啊
因为如果现在学生比之前学生牛，那就不能仅仅说是G F的原因了，也就不能有结论：啊哟想办法控制GF
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