Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions.

You needn't have washed the sheets. The hotel staff does the cleaning.

A. It is good that you washed the sheets.

B. It was not necessary to wash the sheets, even though you did.

C. It was necessary to wash the sheets but you did not do it.

D. It was necessary to wash the sheets and you did not do