A、The man did better in an earlier exam. B、The man didn’t pass the physics exam. C、The man found something wrong with the exam.

M: As usual, the lecture hall is in a complete mess this afternoon. Newspapers, soda cans, used tissues, all of them, just thrown all over the floor. I can’t understand how people can be so thoughtless.
W: Well, your professor should have the authority to get something done about it.
Q: What does the woman suggest the man do?

W: You look upset. Anything wrong?
M: I failed the physics exam again in spite of all the efforts I made.
Q: What do we learn from the conversation?