-I'm going to the Great Wall for a visit.-I think you will have a good time_your stay there.

-I'm going to the Great Wall for a visit.-I think you will have a good time_your stay there.
-I'm going to the Great Wall for a visit.
-I think you will have a good time_your stay there.
A.when B.while C.during D.after
选哪一个,