What might constitute a violation related to BAC levels?

A Blood Alcohol Concentration (BAC) of .08 for a 21-year-old constitutes a violation because it exceeds the legal limit for driving under the influence of alcohol in most jurisdictions, including Georgia. For individuals aged 21 and over, the legal threshold is set at .08, meaning that any measurement at or above this level indicates impaired driving ability and is considered illegal. This is significant because it directly impacts the safety of the driver, passengers, and others on the road, as higher BAC levels significantly increase the risk of accidents and impair judgment, coordination, and reaction times.

While a BAC of .05 is under the legal limit and generally considered safe for a 21-year-old driver, a BAC of .02 is also well below the threshold and may not lead to legal repercussions. A BAC of .10 for an underage driver is indeed a violation, but the question specifically concerns a 21-year-old, making option B the most relevant scenario for legally permissible limits.