A、Doctor and husband. B、Shop-assistant and customer. C、Host and guest. D、Teacher and student. C男士说“给你大衣。”女士回答“谢谢你邀请我们。”由此可以推断他们可

M: Here is your coat.
W: Thanks. It’s very kind of you to invite us.
Q: What is the probable relationship between the two speakers?