单项选择题

M: May I help you
W: Yes, my nephew is graduating from college next week and I’d like to get him a nice gift.
M: What price gift are you interested in We’ll need to know that before we begin looking.
W: Well, I usually spend about 20 dollars for a gift. Do you have anything nice for that price
M: How about a pen and pencil We could engrave his name on them.
W: No, my brother gave him that for his birthday last year.
M: Well then, would he enjoy a chess set
W: No, he doesn’t like chess very much, but he is quite athletic.
M: Then you could get him a handball set.
W: That’s a good idea. I’ll take it.

What is the probable relationship between the man and the woman()

A. Husband and wife.
B. Brother and sister.
C. Clerk and customer.
D. Customer and waiter.