Will give brainliest
an author can establish credibility when dealing with a controversial subject by demonstrating
a) intelligence based on a legitimate knowledge of the subject.
b) goodwill expressing concern for the audience's viewpoint and respect for the audience's intelligence.
c) virtue established from an ethical appeal with the audience by stating beliefs, values, and priorities regarding the subject.
d) intelligence, virtue, and goodwill created by the author and expressed by the rhetor establishes credibility with the audience.