Which of the Following Statements Regarding the Credibility of a Speaker

Which of the following statements regarding the credibility of a speaker is true?

A) A person must have personally experienced something in order to be an expert.
B) A person can be an expert on a topic in which he or she has no direct personal experience.
C) A person's personal bias has no impact on his or her credibility.
D) A person must have a Ph.D. before being recognized as an expert in a field.
E) Credibility is more closely linked to likability than accuracy.