F: I don't know how to start my iPhone. Did I break it? Why is the screen all black? ,M: You just press these 2 buttons at the same time, there. See? Now it's working again.
(A) F: You fixed the screen. (B) F: He started the phone and it was worked well. (C) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (D) F: You have started the phone but not used it.
D