Which driver would be considered to be in violation of the law?

Which driver would be considered to be in violation of the law?

• A. A 25-year-old with BAC .08
• B. A 21-year-old with BAC .09
• C. A 30-year-old with BAC .07
• D. A 21-year-old with BAC .04

Answer: (D)

The test is examining BAC limits and age-based rules for driving. For adults 21 and older, the common legal limit is 0.08; riding with 0.09 would be illegal, while 0.07 is below the limit and allowed. But for drivers under 21, many jurisdictions enforce zero tolerance: any detectable amount of alcohol makes driving illegal. In this question, the driver described in the last option is the one tied to that stricter rule, so a BAC of 0.04 would be considered a violation. The other scenarios either stay at or below the adult limit or exceed it, but do not reflect the under-21 zero-tolerance rule.

The test is examining BAC limits and age-based rules for driving. For adults 21 and older, the common legal limit is 0.08; riding with 0.09 would be illegal, while 0.07 is below the limit and allowed. But for drivers under 21, many jurisdictions enforce zero tolerance: any detectable amount of alcohol makes driving illegal. In this question, the driver described in the last option is the one tied to that stricter rule, so a BAC of 0.04 would be considered a violation. The other scenarios either stay at or below the adult limit or exceed it, but do not reflect the under-21 zero-tolerance rule.