Most states have BAC limits of ___ percent for drivers under age 21.

• A. 0.08
• B. 0.00 to 0.02
• C. 0.05
• D. 0.10

Answer: (B)

Underage drivers are governed by zero-tolerance laws that set a near-zero BAC limit. Because young, inexperienced drivers face higher risk from any alcohol in their system, many states require a BAC of 0.00 to 0.02 percent for anyone under 21. This means even a very small amount of alcohol can violate the law, reinforcing the message that underage drinking and driving is not acceptable and helping deter risky behavior. The other numbers reflect limits that apply to adults with full driving privileges; 0.08 and 0.10 are common thresholds for drivers 21 and older, and 0.05 is an impairment level used in some contexts. So the near-zero range accurately captures the strict under-21 standard.