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Estado físico do condutor, alcool, drogas e medicamentos, sinais de obrigação

For a driver, the blood alcohol content is 0.4 g/l. This means that:

AIn one liter of the driver's blood there are 0.4 grams of pure alcohol.Correct
BOne liter of alcoholic beverage produces 0.4 grams of pure alcohol in the blood.
CIn one liter of alcoholic beverage there are 0.4 grams of alcohol.
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