请教一道新prep的题目

angelazhao1010

121.(25242-!-item-!-188;#058&001232)(T-4-Q34,different type)



In Kravonia, the average salary for jobs requiring a college degree has always been higher than the average salary for jobs that do not require a degree.Over the last few years, the number of Kravonians enrolled in college has been growing steadily.Therefore, the number of Kravonians entering the job market who have at least the qualification of a college degree will eventually be significantly higher than it has been over the last few years.

Which of the following, if true, most seriously weakens the argument?



A. Kravonians with more than one college degree earn little more, on average, than do Kravonians with only one college degree.

B. The average number of years Kravonian college students remain enrolled before completing a degree has been increasing over the past several years.

C. Despite the increase in the number of Kravonians attending college, the percentage of the population attending college is lower in Kravonia than in most other countries.

D. In recent years, employers have been requiring college degrees for workers in jobs that were previously performed successfully by Kravonians who did not have college degrees.

E. For many years, employers in Kravonia have had difficulty finding enough college graduates to fill the high-paying jobs that were available.
答案是B。大家帮我解释一下~谢谢

angelazhao1010

自己顶一下

gaor

文章：因为这几年入大学的人一直在增加，所以这几年劳动力市场上拥有大学学历的人增加了

B: 读大学需要的时间比以前长了，多读几年才能毕业 => 虽然上学的人多了但可能都还没毕业，所以劳动力市场上的大学毕业生人数不一定增加


A在谈工资，没有关系。C在与其它国家比。D说雇主希望员工上过大学。E说雇主找不到足够的拥有大学学历的雇员。所以都不选

angelazhao1010

谢谢楼上，懂了