John is talking to a cashier at the checkout count...

Câu hỏi: John is talking to a cashier at the checkout counter of the supermarket. Cashier: “All right. Keep your receipt. If something comes up, you can show it to us and you can get a refund.” John: “________”

A Thanks. I’ll put it in a safe place                                 

B Thank you. I’ll keep it for you.

C OK, I won’t use it,                                                        

D You’re welcome. See you.