Phân tích câu nói:

"Điều gì không rõ ràng thì không nên thừa nhận." (Descartes)

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.

Our flight was delayed. We decided to spend time at the duty–free shops.

A. As our flight was delayed, we decided to spend time at the duty–free shops. 

B. We have been spending time at the duty–free shops since our flight was delayed. 

C. We decided to spend time at the duty–free shops in case our flight was delayed. 

D. Although our flight was delayed, we decided to spend time at the duty–free shops.