Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best joins each of the following pairs of sentences in each of the following questions.
Our flight was delayed. We decided to take a long walk around the terminal.
A.We have been walking around the terminal for a long time since the delay of our flight.
B.We decided to take a long walk around the terminal in case our flight was delayed.
C.Since our flight was delayed, we decided to take a long walk around the terminal.
D.We have been taking a long walk around the terminal since our flight was delayed.