I owed Bill a favor. I agreed to help him.

Câu hỏi: I owed Bill a favor. I agreed to help him.

A. Although I owed Bill a favor, I agreed to help him.

B. It was only because I owed Bill a favor that I agreed to help him.

C. I only agreed to help Bill because I owed him some money.

D. If I hadn't owed Bill a favor, I would have agreed to help him.