Joe is a former champion weightlifter and professional bodybuilder. He is preparing an informative speech on the abuse of steroids in physical fitness. Through his personal experiences, credibility quality Joe should add to the presentation of his speech.
Credibility is the quality that someone has reliability or trustworthiness. In this scenario, Joe has a lot of credibility in the subject of health specifically steroid uses. Being a professional bodybuilder, he is part of an environment in which steroid use is rampant.
Listeners will assume that Joe most likely knows first-hand about what he is talking about, and this will add to his credibility.
Hence, the correct answer is Credibility.
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