单项选择题

听力原文：W: Hello, Roger? This is Ann.
M: Hi, Ann. How have you been? And how's your new apartment working out?
W: Well, that's what I'm calling about. You see, I've decided to look for a new place.
M: Oh, what's the problem with your place now? I thought you liked the apartment.
W: I do, but it's a little far from the campus. Do you think you could help?
M: All right. So, what kind of place are you looking for?
W: Well, I'd like to share an apartment with one or two roommates within walking distance of school.
M: Okay, how much do you want to spend on rent?
W: Oh, somewhere under $ 200 a month.
M: Hmm. And anything else?
W: Yeah, I need a parking space.
M: Well, I know there's an apartment nearby. I'll drop by there on my way to class today.
W: Hey, thanks a lot.
M: No problem.
What's the relationship between the man and the woman?
A．They are teacher and student.
B．They are friends.
C．They are mother and son.