為何不能選B

问题如下：

Suppose a doctor finds medical job too stressful and now takes a job in a library. Which of the following is used to describe the status of the doctor?

选项：

A.

Frictionally unemployed.

B.

Discouraged worker.

C.

Underemployed.

解释：

C is correct.

A person who has a job but has the qualifications to work at a significantly higher paying job can be categorized as underemployed.

考点： underemployed.

解析：医生作为高素质人才却去到图书馆任职，这份工作与其受教育程度并不匹配，这是典型的 underemployed. C选项正确。

A,B选项和题干并无关联。