Mark the letter A, B, c or D on...

Câu hỏi: Mark the letter A, B, c or D on your answer sheet to indicate the sentence which best combines each pair of sentences in the following questions.
I owed Bill a favor. I agreed to help him.

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

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

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

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