A、Interviewer and interviewee. B、Boss and secretary. C、Doctor and nurse. D、Doctor and patient. D医疗健康类，语义理解题。女士问自己有什么问题，男士说情况并不严重

W: I think the air in the city is seriously polluted. It is horrible.
M: You can say that again. There were not so many factories here before. Days passed when we could enjoy a breath of fresh air outdoor.
Q: What does the man imply?

W: What seems to be my problem?
M: Nothing serious. I will just prescribe some medicines for you and if you take them according to the instructions, you’ll be well in two or three days.
Q: What’s the probable relationship between the two speakers?