The word reggae is more concrete than the word music

Which theory suggests that if you want to prevent a potentially damaging counter-persuasive effort, the best thing you can do is to forewarn receivers to expect the persuasive effort?

A. inoculation theory B. expectation violations theory C. uncertainty reduction theory D. social exchange theory

In a media environment, which individual typically serves as a gatekeeper?

a. reporter b. editor c. broadcaster d. PR professional