Credibility can be gained for your speech with all of the following except ________

A preview statement is usually necessary in the introduction even when a speaker is addressing an audience that is well-informed about the topic.

Answer the following statement true (T) or false (F)

The credibility of a book or journal article is ultimately based on the credibility of its

A. authors. B. digital object identifier. C. year of publication. D. publication city.