focus on how people use messages to influence each other in various contexts and cultures, using a variety of media.

A. Public speakers
B. Radio personalities
C. Motivational speakers
D. Communication researchers

5 answers

This is not a sentence or a question:
focus on how people use messages to influence each other in various contexts and cultures, using a variety of media.

It reads as if it's a definition of some term in your text. Go back into your text to find it.
Yes, Writeacher is correct. What are you supposed to do with this non-sentence, and how can we help you?
Your supposed to find which term fits that definition
It's d btw. Communication researchers
D. Communication researchers