Short Answer 
The answer focuses on evaluating an individual’s credibility and trustworthiness, emphasizing the importance of critical thinking in distinguishing relevant explanations. It notes that defensive behavior, such as trying to distance oneself from stereotypes, can undermine perceived trustworthiness instead of reinforcing it.
Step 1: Understand the Question’s Focus
The question revolves around assessing his credibility and trustworthiness. It seeks to find out whether he can be seen as reliable in his claims. A clear understanding of what credibility entails will help in evaluating the explanations he provides.
Step 2: Evaluate the Responses
Options B and C can be dismissed because they do not address issues of credibility. It’s important to focus only on the explanations that pertain to trustworthiness. This requires critical thinking, distinguishing the relevant aspects that contribute to or detract from his perceived credibility.
Step 3: Analyze Defensive Behavior
His explanations reveal a defensive demeanor as he tries to distance himself from the stereotype of being a “dumb jock.” By referencing his previous grades and insisting on his capability despite past missteps, he aims to reinforce his image as an intelligent individual. This behavior, while intended to establish trust, often undermines it, as it may appear as an overcompensation for doubt.