Question

an adult age 21 and older may be found guilty of driving under the influence if they have a bac of ___ or more.

0.01%
0.02%
0.15%
0.08%

Explanation:

Step 1: Identify the legal limit for adult drivers

In the United States, the standard legal limit for Blood Alcohol Concentration (BAC) for drivers who are of legal drinking age (21 and older) is \( 0.08\% \).

Step 2: Match with the given options

• \( 0.01\% \): Often used for zero-tolerance laws for underage drivers in some states.
• \( 0.02\% \): The standard zero-tolerance limit for drivers under 21 in many states.
• \( 0.15\% \): A level that often triggers much harsher penalties (enhanced DUI).
• \( 0.08\% \): The standard legal limit for adults age 21 and older.

Answer:

0.08%