Columnist: Metro City has a lower percentage of residents with humanities degrees than any other city of comparable size in our nation. Nationwide, university graduates generally earn more than people who are not university graduates, but those with humanities degrees typically earn less than do graduates with degrees in other disciplines. So the main reason Metro City has higher income per capita than any other city of comparable size in our nation must be its low percentage of residents with humanities degrees.
Which of the following, if true, would most strengthen the columnist's argument?
Metro City residents with humanities degrees have higher income per capita than do people with humanities degrees in any other city of comparable size in the nation.
The percentage of residents with university degrees is lower in Metro City than in any other city of comparable size in the nation.
Nationwide, university graduates without humanities degrees typically earn more than do individuals without university degrees.
Metro City residents with degrees outside the humanities have per capita income no higher than the per capita income of such residents of other cities of comparable size in the nation.
In Metro City, a lower proportion of university graduates have humanities degrees than in any other city of comparable size in the nation.
感觉bd应该联合起来才是最好的答案,d选项其实假设了这些城市关于学历的人口构成是相似的,不然假如m全是大学生,那工资高基本上也就是硬实力碾压,和h学历压根没关系。只是d选项的假设更为合理,b选项的假设越层了。如果要强调影响因素a2(因素a包括a1,a2,因素b包括b1,b2),那么应该讨论排除a1的影响力,而不是从a,b两个大因素着手
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