18.Customer: Excuse me, I’d like to exchange the CD player. Clerk: What’s wrong with it? Customer: I bought it from your store yesterday. It doesn’t work. Clerk: No problem. ____________ (A) We have no-refund policy. There is nothing I can do. (B) We offer refunds and exchanges within seven days of purchase. (C) Here is your change. (D) They are sold out.