Regarding persuasive appeals, which of the following statements is FALSE?

Regarding persuasive appeals, which of the following statements is FALSE?
 
  a. Messages that run counter to the perceived interests of the communicator tend to be perceived as more credible.
  b. Those of low intelligence or low self-confidence are generally harder to persuade.
  c. People in a good mood tend to be more receptive to persuasive messages than those in a bad mood.
  d. The more often people are exposed to a message, the more favorably they evaluate it, but only up to a point. e. Communicators who are similar to the audience are perceived more favorably than those who are dissimilar.