Which of the following is a key factor that influences blood alcohol concentration (BAC)?

• A. Hair length
• B. Eye color
• C. Blood type
• D. Body weight

Answer: (D)

Verified step by step guidance

1. Step 1: Begin by understanding the concept of Blood Alcohol Concentration (BAC). BAC is a measure of the amount of alcohol in a person's bloodstream, expressed as a percentage. It is influenced by various physiological and behavioral factors.
2. Step 2: Eliminate irrelevant factors from the options provided. Hair length, eye color, and blood type are not scientifically linked to BAC because they do not affect how alcohol is metabolized or distributed in the body.
3. Step 3: Focus on body weight as a key factor. Body weight influences BAC because alcohol is distributed in the water content of the body. Individuals with higher body weight typically have more water in their bodies, which dilutes the alcohol concentration.
4. Step 4: Consider the relationship between body weight and alcohol metabolism. A person with lower body weight will generally have a higher BAC after consuming the same amount of alcohol compared to someone with higher body weight, due to less water available for dilution.
5. Step 5: Conclude that body weight is a scientifically valid factor influencing BAC, as it directly impacts the distribution and dilution of alcohol in the bloodstream.