---Have a nice day.A. You are welconme.B. Thanks.And you?C. You too.D. All right.

问题补充：

---Have a nice day.

A. You are welconme.

B. Thanks.And you?

C. You too.

D. All right.

答案：

A. You are welconme.

B. Thanks.And you?

(答案→)C. You too.

D. All right.

解析：句意：祝你度过美好的一天。你也是。A不客气B谢谢，你呢？C你也是D好吧，故选C。