If you have had three beers in the past hour, about how long will it take for all the alcohol to leave your blood stream?

Four hours.
Two hours.
One hour.
Three hours.
Explanation

Time is the only factor that will help lower your BAC level. It takes about one hour for the body to metabolize and eliminate the alcohol from one drink. Keep in mind that this can vary depending on factors such as body weight and overall health, so it's always best to err on the side of caution and not drink when you know you are going to drive.

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