F: I got to work right on time and Jason has been here since 8:45. So there were 2 people here, doing nothing waiting for you to come. ,M: I'm sorry for being late for half an hour. I know it's my job to open the doors at 9:00.
(A) F: It's OK. But don't be late for half an hour next time. Opening the doors at 9:30 is not allowed. (B) F: Thanks for opening the doors at 9:00 today. (C) F: Thanks for opening the doors at 8:45. (D) F: I’m sorry, I don’t understand. Could you say it again?
A