A、She would mark the exam papers herself. B、She would not give her students an exam. C、She would collect the exam papers herself

W: Hello! This is Prof. Gates’ office. I’m calling to remind you of your 4:15 appointment with the professor to discuss your term paper tomorrow.
M: Oh. Thanks. It’s a good thing that you called. I thought it was 4:15 today.  
Q: What do we learn from the conversation?

M: Excuse me, but I didn’t hear clearly what you said. Did you say that your teaching assistant would mark the exam papers?
W: No, I said I would collect the papers. I’ll grade them myself.
Q: What did the woman say about the exam?