An element of a successful persuasive speech that is most directly dependent on the qualifications of the speaker is
a. factual information.
b. rationality.
c. deductive reasoning.
d. credibility.

The best answer would be B. An element of a successful persuasive speech that is most directly dependent on the qualifications of the speaker is rationality. In order to persuade audience, being rational at what you say is essential. Everything you say must make sense and is reasonable. It should be based on facts so that people will believe and trust you.