Detailed Instructions: In this task, you will be shown a conversation. You need to write a question with three choices for the conversation. Your question should be answerable based on the conversation and only have one correct answer. Note that you don't need to answer your question. "W" and "M" in the conversations stand for "woman" and "man".
Problem:W: Yes. Can I help you? M: Yes. You see, I've bought this personal stereo at your shop 3 days ago. And I'm afraid it hasn't really matched up to what I was told about. W: I see, what exactly is the matter? M: Well, first of all, there is this large scratch across the front of it. W: But you should have noticed that when you bought it. M: But it was in the box and all sealed up. W: Well. I'm sorry, but it really is your responsibility to check the goods when you buy them. How are we to know that it wasn't you who made the scratch? M: But that's ridiculous. But anyway, it's not the most important thing. I really am not happy about this other thing. W: And what is that? M: Look. It says here that the noise from it should be undetectable by other people. W: Yes, that's right. M: But people can hear it, and it's really embarrassing on the bus and underground. W: Well, I'm sorry, but it must be the way you are wearing the headphones. M: Look. I know how to put earphones in my ears. Thank you very much. But what I want to know is, what you are going to do about it at all? W: Well, I suppose we could exchange it for another model, if you really aren't happy with it. M: No, I certainly am not. W: Well, if I could just have the receipt. M: Oh yes. Well, there is a slight problem about the receipt.
Solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
About the scratch on the product, the shop assistant thinks that (A) the customer made it himself. (B) there was definitely not one then. (C) the customer should have checked.