W: Why are you so upset, David? M: My boss warned me not to spend all day communicating with my friends, but I didn't. He just didn't believe me. W: You must have forgotten to close your hotmail's window again. You should have known better., Question: What does the woman think that the man did wrong? (A) He spent all day emailing. (B) He left his email page open. (C) He forgot to close the door.
(B) He left his email page open.