A、Professor and student. B、Shop assistant and customer. C、Librarian and reader. D、Two friends. C浏览选项后发现每个选项包含一组相互关联的人。据此可推断此题是考查

M: I’m going out to pick up a hamburger. Can I get you something?
W: Oh, I have eaten too much at lunch. The yogurt I brought with me will be enough. But thank you all the same.
Q: What will the woman probably do?

M: How long can I keep the book?
W: Four weeks, but you can renew it if you need it for a longer time.
Q: What is the possible relationship between the speakers?