Which of the following is not an example of nonverbal communication?
a. facial expressions
b. e-mail messages
c. crossed arms
d. rolling of eyes

The answer which is not an example of nonverbal communication is B. email messages, whereas facial expressions, crossed arms, and rolling of eyes are.
Nonverbal communication means that no words are used to convey a message, which is why A, C, and D are great examples of such communication. You can send a clear message when you are rolling your eyes, and you don’t even have to say a single word. In email messages, you are obviously using words to say what you mean, even though you did not say them out loud.

If I'm not mistaken, the answer is B