F: OK, boys. It's time that you learn how to do your own laundry. Who can tell me the first thing that you need to do? ,M: Separate the whites from the dark colours. ,F: Good job, Matt. Now, what do you do after you put the clothes in the washer? ,M: Choose the speed, size of the load and water temperature that you want. ,F: Excellent, Matt. You're almost ready to do this yourself. You just forgot one thing, put in the soap, before you start the machine. Then press the start button and wait until the washer makes the short high sound. That means the cycle is complete, then what do we do? ,M: Clean out the dryer and then put the clothes in it, choose the temperature level and timing and press start.
(A) F: Yeah, but you forgot pressing the start button. Then the long high sound means  the cycle is complete. (B) F: Really? You mean we don't have to clean out the dryer or put the clothes in it? And you forgot putting in the soap? (C) F: Yeah,  choose the temperature level and timing and press finish button. But you forgot choosing the speed. (D) F: I’m sorry, I don’t understand. Could you say it again?
D