单项选择题

[听力原文]
M: Excuse me, can you tell me the way to the library
W: Sorry, I am a stranger here. There is a policeman across the street. Why don’t you ask him

What does the woman mean()

A.She is not in the city.
B.She is not able to help.
C.She is a policeman.
D.She is a resident of this city.