F: Our guest today is Dr. Lia Kwan. Dr. Kwan works with computer related injuries and problems. Dr. Kwan, do you see more computer-related problem these days? ,M: Oh, definitely yes. People are doing more and more with computers and that means more physical problems. ,F: So what can we do? ,M: Well, how you sit at the computer is very important. First, have a good chair. It should support your back well. ,F: OK, a good chair. ,M: And also your feet should be flat on the floor when you're sitting. You shouldn't cross your legs. ,F: OK. I don't always keep my feet flat on the floor at the computer. ,M: I know, it's hard sometimes. Anyway, you shouldn't sit too close to the screen either. ,F: Is half a meter away enough? ,M: Not exactly. You should sit about an arm's length away.
(A) F: Exactly, we should sit about an arm's length away from our computers. (B) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (C) F: Why don't you mention how far away should people sit from their computers? (D) F: Although how we sit at the computer is not important, we should sit about an arm's length away from our computers.
A