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An alcohol level of 0.5 g/l of blood means that:
AIn one liter of alcoholic beverage there are 0.5 grams of alcohol.
BOne liter of alcoholic beverage produces 0.5 grams of alcohol in the blood.
CIn one liter of blood there are 0.5 grams of pure alcohol.Correct
Explanation
The blood alcohol content (BAC) expresses the concentration of alcohol present in the driver's bloodstream. The unit of measurement used is grams per liter of blood (g/l), which means that a rate of 0.5 g/l corresponds exactly to the presence of 0.5 grams of pure alcohol in each liter of blood. The remaining options are incorrect because they relate the rate to the volume or composition of the alcoholic beverage itself. BAC measurement focuses exclusively on the amount of alcohol that has already been absorbed by the body and is circulating in the blood, regardless of the type or quantity of beverage ingested.
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