F: Jack, I was just looking at the schedule. These talks seemed too close together. Push each talk back at least 10 minutes. ,M: I forgot there're supposed to be enough time for questions after each talk.
(A) F: Yes, the problem is that there are too many talks. And then, we should push each talk back at least 15 minutes. (B) F: You should spare more time between talks. (C) F: I’m sorry, I don’t understand. Could you say it again? (D) F: You should spare at least 15 minutes between talks.
B