问题详情

Why does the man say this:
A．To suggest a course of action for solving the woman"s problem.
B．To express frustration that the woman is unfamiliar with the library.
C．To let the woman know who will be available to help her in the library.
D．To indicate that he does not have time to assist the woman now.请帮忙给出正确答案和分析，谢谢！