单项选择题

M: Thank you very much, Miss Times. That helps me a lot.
W: I am glad I could be of some help, Carlos. Let me know if you have any more questions later.
M: I will. I thank you for giving up your coffee break to help. I know you need one after teaching three classes.
W: Oh, I don’t mind. Teaching is what I love most.
M: Well, goodbye and thanks again.
W: You are very welcome, Carlos. See you on Monday class.

When does the conversation take place()

A. Before class.
B. After class.
C. During class.
D. In a restaurant.