David is a collegiate track athlete, and his friend Tony is sedentary and overweight. At a party, they drink the same number of beers at the same rate, and they ate approximately the same amount of food before they started drinking. Which factor will account for differences in their blood alcohol concentration?A) Amount of body fatB) History of alcohol consumptionC) Rate of nutrient absorptionD) Amount of physical activity prior to drinking

Option A

Explanation:

The rate and amount of decomposition of alcohol depends on the amount of body fat in an individual. The activity of enzyme alcohol dehydrogenase that breaks down alcohol is affected by concentration of body fat and water.  

The higher the body fat and the lower is the body water and fluid, the higher is the activity of enzyme alcohol dehydrogenase.  

Thus, the higher activity of enzyme alcohol dehydrogenase ensures higher rate of breakdown of alcohol due to which level of alcohol concentration in blood of  an individual reduces.  

Hence, option A is correct

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