(单选题)

Why do black teachers tend to be more effective with black students?

A.Teachers sympathize with students of their own race.

B.There are entirely some other identified reasons.

C.Students feel secure, so they respond better.

D.The reasons are far from clear and definite.

参考答案：D

参考解析：

推理判断题。根据文章倒数第二段第二句“Again, it is unclear whether this is because of a role model effect (students respond better to a teacher of their own race) or an empathy effect (teachers empathize better with students of their own race) or something else entirely”可知原因不确定，故选D。

知识点：