This is the term used for the purposeful design of entertainment media specifically for the purpose of educating viewers:

Melissa wants to increase perceptions of her credibility. What should she be aware of?

a. Her material is relevant. b. Her eye contact is not as important as her attire. c. Her tone of voice is less important than the words she is saying. d. She doesn't have to cite her sources since she is the "expert".

To digitally encode the highest frequency in a signal successfully, it has to be sampled at a rate at least ________ its frequency:

a. twice b. three times c. four times d. none of the above