【单选题】

Man: I’m exhausteD、I stayed up the whole night studying for my midterm math exam.

Woman:But why do you always wait until the last minute
Question: What does the woman imply
A、The man is usually the last to hand in his test paper.
B、The man has made a mess of his midterm exam.
C、The man has bad study habits.
D、The man is a diligent student.