F: How much does the dress cost? ,M: $100, but I can give you a 20% discount. ,F: I'll take it.
(A) M: Excuse me, could you repeat the question? (B) M: You should pay me 80 dollars for the hat. (C) M: Good. Then just give me 80 dollars, which is a 20% discount of $100. (D) M: Don't pay me 100 dollar. I can give you a 10% discount.
C