Which of the Following Statements Is True of the Various

Which of the following statements is true of the various elements of persuasion?

A) Dissimilarity is a credibility characteristic that helps a communicator change people's attitudes.
B) Television is generally a more powerful medium than print sources for changing attitudes.
C) Younger people are less likely to change their attitudes than older ones.
D) Individuals with strong attitudes are more easily persuaded than those with weak ones.