Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
Sally paid for her travel in advance, but I'm not sure.
A.Sally needn't have paid for her travel in advance.
B.Sally should not have paid for her travel in advance.
C.Sally may not have paid for her travel in advance.
D.Sally couldn't have paid for her travel in advance.

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