If your blood alcohol level is 0.04 percent, you:
No amount of alcohol is safe to drink before driving. Even with a blood alcohol level of 0.04 percent, which is below the legal limit for people age 21 and older, you are two to seven times more likely to be involved in a crash than a person with no alcohol in their blood.
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This questions appears in the following tests:
Pennsylvania Practice test 10
Pennsylvania Practice test 16