Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

It was an interesting novel. I stayed up all night to finish it.

A.A. I stayed up all night to finish the novel so it was interesting.

B.B. Unless it were an interesting novel, I would not stay up all night to finish it.

C.C. Though it was an interesting novel, I stayed up all night to finish it.