单项选择题
W: Did a lot of people attend the lecture
M: Well, yes and no.
W: What do you mean
M: You see, the classroom was quite full at the beginning. Almost all the seats were occupied. But after the short rest, almost one-third of the audience left.
W: Terrible! That was a very rude thing. I should have been there. I had told the students to behave themselves. I do hope Professor Black was not angry.
M: What do you mean He wasn’t even there.
W: What Professor Black did not come
M: No, his lecture is Thursday next week, not this Thursday.
W: Oh, yes, of course. How silly of me!
A. She meant it was silly of her not to attend the lecture.
B. She meant it was silly of her to blame the students.
C. She meant it was silly of her to mix up the dates of the lectures.