A、They are strangers. B、They are colleagues. C、They are friends. D、They are neighbors. DWhat’s the relationship between the two

M: That box looks heavy, Serena. Can I help you carry it up to your apartment?
W: Thanks. This chair was on sale, but I wasn’t thinking about the stairs. I wish we had an elevator in this building!
M: I’ve got this side. Hey, Serena, I was wondering, what do you do during the day?
W: Well, on weekdays I usually get up at ten. I get on the Internet or read the paper for two hours. Then I eat lunch around noon. If I have time, I’ll go to watch an opera at the theater.
M: When do you go to work?
W: I catch a bus at three-thirty, and I get to the office about forty-five minutes later. Wait, let me unlock the door.
M: And what time do you come back?
W: Here in the corner is fine, thanks. Uh, I get home pretty late, usually after one in the morning.
M: Really? What exactly is your job?
W: Oh, I thought you knew. I’m a TV announcer. I do WNTV’s entertainment reports! Haven’t you seen me before?
M: Gee, I’m sorry. I never watch TV.