Final answer:
The student's question about what Thomas brings to the hospital to demonstrate his father's truthfulness cannot be conclusively answered from the given options. While a lie detector test report might seem relevant, its accuracy is questionable, and thus, the correct information may lie within the original text or require additional context. The correct option is approximately option B.
Step-by-step explanation:
The student's question pertains to what Thomas brings to the hospital to prove his father's veracity and mental stability. After considering the context provided and evaluating the options, one can conclude that the correct option is not explicitly stated.
However, based on the related information given about the credibility of evidence regarding truthfulness and sanity, lie detector tests, and physiological arousal, it can be inferred that while option B - A lie detector test report showing his father's honesty, might seem relevant, this is not a strong piece of evidence due to the lack of any particular pattern of physiological arousal that is associated exclusively with lying.
Therefore, in the absence of the specifically correct answer from the options provided, we suggest looking at the original source material for accuracy or finding additional context that may offer clues to which evidence Thomas brings to support his father's claims.