Toni is unknown to her audience, but she is well prepared, organized, has sources to cite, and has a good delivery. Although Toni is unknown, what type of credibility can she attain during the course of the speech?

Derived

Explanation:

'Derived' credibility is demonstrated as the credibility(the faith or trust audience has on them) that a speaker gains during the course of the speech. Toni can develop 'derived' credibility through the quality and professional skills(preparation, organization, contextual-depth, excellent delivery, etc.) displayed in her speech. This professionalism would not only help her gain an edge over the audience's trust but establish the validity of her claims logically that would assist her gain their faith and acceptance by the end. Thus, 'derived' credibility is the answer.