[求助]PPREVIEW听力疑问

W: I saw you at the visiting scholar’s lecture yesterday. I didn’t know you are interested in behavior modification.

M: I am not but my psychology professor gives us six credits for going, and I really need it.

What can be inferred about the man?

A He is not doing well in his psychology class

B.He needs information about behavior modification

答案选A，我选了B，茫然了。还请哪位大侠指教一下，多谢！

because his grade is not good enough in psychology class , he wnat to get six credits to improve it.