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.
Tom’s joke was very funny. We couldn’t help laughing.
A.Tom’s joke couldn’t help us laugh.
B.Tom’s joke couldn’t make us laugh.
C.We laughed because Tom’s joke wasn’t funny enough.
D.We couldn’t help laughing at Tom’s joke.