Complete the sentence with the most appropriate word or phrase out of the given options.
She did not mention that to Peter, ____?

did she

The correct answer is OPTION 4 - did she

This is a question tag sentence. The structure of a question tag is:

1. If the main part of the sentence is negative, the tag should be positive.

2. If the main part of the sentence is positive, the tag should be negative.

Here, "She did not mention that to Peter" is a negative sentence (because of "did not"), so the question tag must be positive → "did she?"

OTHER OPTIONS

• should she  (Incorrect auxiliary verb)

• did not she  (Incorrect structure)

• she did  (Incorrect word order)