【单选题】

根据各组对话内容，从下面提供的5个选项中选出能填入空白处的最佳选项。

A、Sure. What is it
B、It’s very nice of you to say so.
C、It’s nothing.
D、Have a nice trip!
E、Certainly, Here you are. A、Could I use your dictionary, pleaseB、______ A、Thank you. I’ll return it as soon as possible.