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.
We ought to visit Grandma. Otherwise, she will be worried about us.
A.Grandma is worried about us, so we ought to visit her.
B.We need not visit Grandma unless she is worried about us.
C.We should visit Grandma in case she will be worried about us.
D.If we do not visit Grandma soon, she will start to worry.

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