F: Jonathan, look at all these dirty clothes. It's time to teach you how to use the washing machine. ,M: Oh mom, do I have to? ,F: Yes. You're 16 now. I was doing laundry when I was half your age, your sister has been doing it since she was 10. So it's your turn to learn. ,M: Fine. It's just that there are so many buttons and settings. ,F: It's easy once you know how to do it. This is the load setting, choose small medium or large based on how many clothes your washing. I'm sure you can figure that out for yourself. ,M: I can do that. ,F: Good, next you choose the temperature, cold, warm or hot, just use cold for now. ,M: OK, and this spin cycle? ,F: That is for how fast the machine turns. Normal is what you will be using for most of your clothes. Heavy is for your jeans and towels, light is for your sheets and pillowcases. But I'll do those for you.
(A) M: You mean light spin cycle is only used for jeans and towels? I understand. (B) M: I’m sorry, I don’t understand. Could you say it again? (C) M: Why is light spin cycle used for towels only?  What about sheets and pillow cases? (D) M: Why is light spin cycle used for sheets and pillow cases? I am quiet confused!
D