【单选题】Speaker A: I'm terribly sorry, but something unexpected has come up and I won't be able to keep my appointment with you this afternoon. I wonder if we could change the time of Our meeting to sometime ...
A.
Thanks for calling. I'll expect you at the same time tomorrow morning.
B.
OK. Let's meet each other later today.
C.
Don't worry. First things first.
D.
I'm sorry. I won't be free the whole morning. What about tomorrow afternoon?