A、Because of the over-production of prostaglandin. B、Because he has no aspirin. C、Because he is tired. D、Because of the Biology

W: Hi, Stan, where have you been?
M: Oh, just at the Student Union office trying to see if I can catch you there. I also tried to find out if professor Steinfield has any old exams from years ago.
W: Why don’t you just ask me? I took that class last semester and aced it.
M: Yeah... you ace all your subjects. But the exams change from year to year, don’t they?
W: True, but the style is pretty much the same from year to year.
M: So tell me about the process of prostaglandin. I can barely even pronounce it, let alone explain it.
W: Hey, I am no expert but what she’ll be mainly looking for is that you know how it affects the digestion, reproduction, and immune systems.
M: What kind of question might she ask?
W: Well, for example, you’ll probably have to say how prostaglandin, if over-produced, can give you headaches and fevers and stuff.
M: Talk about headaches. I think I ’m getting one now. Can you give me an aspirin? Well, I am sure it’s this Biology class that’s doing it.
W: Hey, I’ve heard you are no slouch at poetry. You get me through my course in 19th century poetry and I’ll make you an expert in Biology.
M: It’s a deal. Where shall we begin? Poetry is up my alley.
Q. 11. Why was the man in the Student Union Office?
Q. 12.What suggestion does the woman give to the man?
Q. 13.What reason does the man believe he has a headache?
Q. 14.What do the speakers agree upon at the end?