Task: Dialogue Generation
Input (English): M: I'd like to buy these for greeting cards. Are they 10 Yuan each? ,F: Three of them are, but that smaller one costs only half the price of the big one.
(A) M: I am really sorry, I did not catch that. Would you slow down, please? (B) M: So I have to pay 35 yuan, right? (C) M: Since these cards are 15 yuan each and the smaller ones are 10 yuan each, I need to pay 40 yuan. (D) M: I need to pay 35 yuan, although these cards are 15 yuan each, right?
Output (English): B