A、Because some book in the library are very expensive. B、Because some books in the library are rare. C、Because sometimes student

W: Excuse me, could you do me a favor?
M: Sure. What’s the problem?
W: I am new here, and I was wondering how I could use the library.
M: Well, if you’re a regular student you can use your student ID as a borrower card. If not, you would apply at the loan office.
W: What exactly can I borrow? I mean, can I take anything out from the library?
M: Well, you can borrow almost everything including books and multimedia materials. But you cannot take out any serial like journals and magazines.
W: Can you tell me something about the recall system here? My friend tells me if a book gets recalled, you have to bring it back right away, is that true?
M: Oh, certainly not right away, but you do have to take it back within several days of the recall notice.
W: Would you tell me why?
M: The reason we have this system is because that sometimes students need certain materials urgently.
W: But what if I am not around to receive it?
M: If we cannot contact you by phone or by mail, we will contact the department that you are registered in and have a recall notice delivered to your teacher.
W: Just one more question before I run to class: How much are the fines, by any chance?
M: 30 cents a day per book. So, take care not to be late.