A、Marketing. B、Study habits. C、Sleeping habits. D、Working habits. B

Interviewer: Emm, excuse me, may I ask you a few questions?
Interviewee: Yes, what’s it for? Is it a marketing survey?
Interviewer: No, no, no. It’s a survey about study habits. When do you get up every day?
Interviewee: Half past six on weekdays, but on weekends, I always get up late.
Interviewer: How late?
Interviewee: About 11:00 or 12:00. I think I must reward myself for working hard all week.
Interviewer: Of course, you’ve earned it. Do you work best in the mornings or in the afternoons?
Interviewee: Well, I guess ... in the mornings. I seldom study in the afternoon. You see, my mind is awful then, so I have to take a nap,...a long nap for 2—3 hours ... or ... can’t concentrate ...
Interviewer: I see. Do you often stay up late?
Interviewee: Oh, yes, almost everyday. I usually don’t go to bed until 12 o’clock.
Interviewer: That’s funny. Almost everyone in your school says that. Thank you very much.