M: What seems to be the matter? W: I just can't sleep well, doctor. M: I see. And how long have you had this problem? W: Oh, for about two weeks now. M: Two weeks. Do you have headaches? W: Sometimes. M: Fever? W: No. M: Are you having any family problems? W: No, not really. We all get along pretty well. M: And how about work? W: Well, I've been working a lot lately... more than 11 hours a day. M: Maybe you should take a vacation and just rest for a few days. W: Well, I can't right now. We're in the middle of some important business. M: Yes, I understand, but you really need to slow down. You're going to kill yourself if you go on like this., Question: Why can't the woman sleep well? (A) Because she has been working too hard. (B) Because she has a family problem. (C) Because she has a high fever.
(A) Because she has been working too hard.