【单选题】

M: How about joining me for a cup of coffee

W: I’d love to, but I’m exhausteD、I was up till 3 this morning, writing a paper for my literature class.
Q: Why does the woman decline the man’s invitation
A、She wants to get some sleep.
B、She needs time to write a paper.
C、She has a literature class to attenD、
D、She is troubled by her sleep problem.