[逻辑小分队] 求教一道CR难题

Columnist: Metro City has a lower percentage ofresidents with humanities degreesthan any other city of comparable size in ournation. Nationwide, universitygraduates generally earn more than people who are not universitygraduates, but those with humanities degrees typically earn less than do graduates with degrees inother disciplines. So the main reason MetroCity has higher income per capita than any other city of comparable size in our nationmust be its low percentage of residents with humanities degrees.

Whichof the following, if true, would most strengthen the columnist's argument?

A. Metro Cityresidents with humanities degrees have higher income per capita than dopeople with humanities degrees in any other city of comparable size in the nation.

B. The percentageof residents with university degrees is lower in Metro City than in any other city of comparable size in the nation.

C. Nationwide,university graduates without humanities degrees typically earn more than do individuals without university degrees.

D. Metro City residents with degrees outsidethe humanities have per capita income no higher than the per capita income of such residents of other cities of comparable size in the nation.

E. In Metro City,a lower proportion of university graduates have humanities degrees than in any other city of comparable size inthe nation.

答案选D

其实我主要是对题目中的结论有问题，income per capita高的原因为什么会是lowest percentage of humanities degrees

我觉得在humanities degrees占比相较于同等城市最少的情况下，income per capita高的原因应该是每部分人均赚的钱相对较多才对，但是怎么想都想不到正确答案那块

正确答案说其他degree的人赚的不比其他地方的人多，那很有可能是没有degree的人赚的比其他地方的人显著多，感觉和题目结论没什么大关系

求教高手解答！！！