大全-12-9

大全-12-9.      In 1990 all of the people who applied for a job at Evco also applied for a job at Radeco, and Evco and Radeco each offered jobs to half of these applicants. Therefore, every one of these applicants must have been offered a job in 1990.

The argument above is based on which of the following assumptions about these job applicants?

(A) All of the applicants were very well qualified for a job at either Evco or Radeco.

(B) All of the applicants accepted a job at either Evco or Radeco.

(C) None of the applicants was offered a job by both Evco and Radeco.

(D) None of the applicants had applied for jobs at places other than Evco and Radeco.（C）

(E) None of the applicants had previously worked for either Evco or Radeco.

Why not b？

谢谢！

B中的accepted是无关概念。

C中如果有人同时接受了两个公司的offer，那么肯定有人没有拿到offer，导致原文结论不成立。所以C是原文的必要条件。

谢谢leeon，明白了。我总是对“无关概念”不敏感，真是很羡慕你们的火眼金睛！