A)Because the woman had left before the man came.
B)Because the woman didn't want to see the man.
C)Because the man had left before the woman came.
原文：
Woman: I arrived at the library at 10:30. Why didn't you meet me?
Man: I got there at a quarter to eleven and waited a while. But I guess you had left before I got there.
Question: Why didn't the woman see the man?