Final answer:
The resolution contributes to the theme of the passage by emphasizing the danger of keeping secrets. So, the correct answer is C.
Step-by-step explanation:
The resolution contributes to the theme of the passage by emphasizing how dangerous it can be to keep secrets from others. In the passage, the resolution reveals that Twain's second-guessing and paranoia were unfounded, highlighting the consequences of his obsession with revenge and the negative impact it had on him. This aligns with option C, which states that the resolution shows how paranoia can be deadly for some people.