Which statement about blood alcohol content (BAC) is true?
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If you refuse to take a chemical test of your breath, you will be forced to drive back home.
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The breath test is used by law enforcement to determine a person's BAC.
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Drinking coffee will lower your BAC.
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BAC levels are reduced by a person's physical fitness.
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Explanation
Chemical tests use breath, blood, urine or saliva to measure the BAC of a person. A breath test, also known as a breathalyzer, analyzes the concentration of alcohol in a person's breath, providing an estimate of their BAC.
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