Student: How long can I have these books? Librarian: This one is on the three-hour-loan; you may have it for only three hours ______.
A.
The others are due in 30 days, on February 3.
B.
You may have it longer if you like.
C.
Drop the books into the RETURN boxes by the library entrance.
D.
The fine for overdue books is 5 dollars an hour.