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.
It wasn't necessary for you to do all this work, although you did it.
A.You mustn't have done all this work.
B.You may not have done all this work.
C.You couldn't have done all this work.
D.You needn't have done all this work.