We listend to a speech last night. It was informat...

Câu hỏi: We listend to a speech last night. It was informative.

A. We listend to a speech last night what was informative.

B. We listend to a speech last night when it was informative.

C. We listend to a speech last night which was informative.

D. We listend to a speech last night on which was informative.