When a target audience already holds a favorable opinion on a topic or issue, a(n) _____ is most effective. Marketing When a target audience already holds a favorable opinion on a topic or issue, a(n) _____ is most effective.A. one-sided messageB. two-sided messageC. nonverbal appealD. open-ended messageE. fear appealAnswer: A Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+