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.
The bag was heavy. We couldn't take it with us.
A.Had the bag not been heavy, we could have taken it with us.
B.If had the bag not been heavy, we could have taken it with us.
C.If the bag were not heavy, we could take it with us.
D.Unless the bag had not been heavy, we could have taken it with us.