【答案解析】[听力原文]6-7
W: Can I help you?
M: Yes. I bought this radio two days ago, but I'm afraid it doesn't work. I'd like to change it for another one.
W: Oh, dear. Yes of course. Have you got your receipt?
M: Yes, here it is.
W: Thank you. Just a moment, please.
单选题
What is the most probable result of the conversation?