F: What are you guys doing? ,M: Can't you see? We're making paper airplanes. ,F: Yeah, I see that, but what are you doing with them? ,M: We're flying them, of course. ,F: Out of the window? ,M: Yeah.
(A) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (B) F: Why are you flying these paper airplanes? (C) F: Why are you watching people on the street now? (D) F: Why are you flying paper airplanes indoors?
B