Citing to support a point will add credibility to an argument. a. visual aids b. expert testimonies c. the thesis statement d. handouts

The answer is expert testimony. It is a quotation or paraphrase from a recognized professional in the field. Citing expert testimony can add credibility to the arguments. Furthermore, to being the basis that a speech stands on, provision also helps us simplify content, increase speaker credibility, and make the speech more intense.

the simple predicate of the sentence is camped.