A、Father and daughter. B、Teacher and student. C、Doctor and patient. D、Boss and secretary. C

M: Is this the way to McGraw Books?
W: Yes, it is. Turn left at the Second Avenue. Go about three blocks, and you’ll see the bookstore on your right. It’s next to the post office.
Q: What is the man looking for?

W: I think I’m running a temperature, mid I feel sick.
M: OK. Let’s have a check-up. Come into the examination room, please.
Q: What is the probable relationship between the two speakers?