单项选择题

Questions 4 to 7 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions.
Now listen to the conversation.

What can be concluded about the woman

A.She knows which book the man needs.
B.She is too busy to find the information for the man.
C.She is not sure she has heard the man correctly.
D.She is not sure she can find the information the man needs.