F: Hello, Mr. James. I'm calling about your talk next month. It's getting close and there are a couple of things I need to check with you. ,M: OK.
(A) F: Well, I am calling to inform you of the talk this week. (B) F: Sir, we would like to invite you to give us a talk next week. (C) F: Thank you. I would like to confirm some details of the talk. (D) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that?
C