Which one of the following acts is an example of body language?

A. Acting on an attitude

B. Rolling of the eyes

C. Employing the peripheral route of persuasion

D. Showing prejudice

Body language is based on transmitting information by the movement of the body, rather than by language or other means.

The example of body language here is rolling of the eyes (option B) : it means that something is silly or boring.

The other options refer to verbal communication or commucation in general.