Which of the following statements is true about source credibility?
A. High credibility sources are always more effective than low credibility sources.
B. The use of a low credibility source is more effective when the audience has an unfavorable initial opinion or attitude on the issue.
C. The persuasiveness of a low credibility source may decline over time due to the sleeper effect phenomenon.
D. A low or moderately credible source can be more effective than a high credibility source when the receiver has a favorable initial attitude or opinion.
E. Low credibility sources are more effective than high credibility sources when they are arguing for a position opposing their own best interest.
Answer: D