Which of the Following Statements About Source Credibility Is True

Which of the following statements about source credibility is true?

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 may be more effective than a high credibility source when the receiver has a favorable initial attitude or opinion.
E) None of the above statements about source credibility is true.