单项选择题

听力原文:W: Are you sure you can't stay any longer? The others are not leaving yet, you know.
M: No, I'm afraid I must go, but thank you very much indeed for a most enjoyable evening, and a wonderful dinner.
What is the probable relationship between the two speakers?
A.Waitress--customer.
B.Hostess--guest.
C.Wife--husband.
D.Mother--son.

A.
What
B.Waitress--customer.
B.Hostess--guest.
C.Wife--husband.
D.Mother--son.