One . . . . . . . and you know who among them is the culprit.

The correct answer is B. peep.

A peep is a quick, furtive look, especially at something that is not supposed to be seen. It is often used in a negative context, to suggest that someone is being sneaky or voyeuristic.

The other options are not as well-suited to the context of the question. A gaze is a long, steady look, and a look is a general term for any kind of visual inspection. Sight is the ability to see, and it is not typically used in the context of catching someone doing something wrong.

Here are some examples of how the word “peep” can be used in a sentence:

• The little boy peeped through the keyhole to see what was going on in the next room.
• The woman peeped out the window to see if anyone was coming.
• The cat peeped out from under the bed.

I hope this helps!