问题详情

Greg: Hey Merlin. I"d like to ask you a question.
Merlin: ______
Greg: Well, I"m thinking about going to Sweden. What"s the best time to go？
A．Yes, go ahead.
B．Sorry, I"m kind of busy.
C．OK, what"s up？
D．Yeah, what"s on your mind？请帮忙给出正确答案和分析，谢谢！