单项选择题

W: Oh, I’m too sleepy to study.
W: Well, Bob, if you hadn’ t watched that late movie last night, you wouldn’ t be so sleepy.

What can we learn about Bob()

A. He fell asleep late watching TV last night.
B. He stayed up late Studying last night.
C. He stayed up late watching a film last night.
D. He did not get any sleep last night.