F: Could you help us carry these boxes, sir? ,M: I would like to help you but I've got a pain in my back.
(A) F: I am really sorry, I did not catch that. Would you slow down, please? (B) F: You can't help me? That's OK. Please have a good rest. (C) F: You will carry the boxes later? Thank you, madam. (D) F: Why do you refuse to pay for boxes?
B