答案是C 可是D为什么不行呢

bernadotte

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.  Current enrollments in Kravonia’s colleges indicate that over the next four years the percentage of the Kravonian workforce with college degrees will increase dramatically.  Therefore, the average salary for all workers in Kravonia is likely to increase over the next four years.



Which of the following is an assumption on which the argument depends?

1. Kravonians with more than one college degree earn more, on average, than do Kravonians with only one college degree.
   
   
   
2. The percentage of Kravonians who attend college in order to earn higher salaries is higher now than it was several years ago.
   
   
   
3. The higher average salary for jobs requiring a college degree is not due largely to a scarcity among the Kravonian workforce of people with a college degree.
   
   
   
4. The average salary in Kravonia for jobs that do not require a college degree will not increase over the next four years.
   
   
   
5. Few members of the Kravonian workforce earned their degrees in other countries.
   
   
   

edwardelric

c指定是对的了呀，c 比d要更加的关键，在d成立的条件下，c成立的话就成立这样的话大学生多了，供给多了，钱少了。c是最直接的因素，所以是c，本题目的考点也在c选项

x_fan

4D取非为
不要大学学历的工作的平均工资在未来四年将增长。
加强了原文。
3C是明显的取非削弱。