[求助]TT GWD-3-19

Q19:

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.(C)

   E.      Few members of the Kravonian workforce earned their degrees in other countries.

不太明白为什么要选c

如果说Kravonia有degree的人工资比没有degree的工资高，是因为Kravonia地方缺少degree的人，也就是C取非的说法，那我们可以推出，未来4年内大量的大学毕业生涌出，Kravonia会不缺少degree的人。那时，他们的工资和那些没有degree的人就不会有差别了。换句话说，C取非的话，原结论不成立。所以C是答案。

明白了,非常感谢!