一題重播題 - 英檢

我作ETS線上測試遇到一題conversation重播題不太懂
題目如下(擷取):

Student : I'm glad I came to see you before I turn this in.
I guess that I have to do some more work on it.

Professor : Well, it's not exactly something we teach course in.

Student : Ok (laughing), professor Haskel, thanks for your help.

Professor : You're welcome.

題目是 "Well, it's not exactly something we teach course in" 這句話的目的

A. to encourage the student to do more work independently
B. to show understanding for the student's concerns
C. to recommend that the student take a course at another university
D. to imply that people are unfamiliar with the student's research topic

答案是 B

雖然好像只有B可以選,不過不太懂那句話的意思,不知道有沒有大大可以稍微解釋一下

大感謝

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