What is the legal BAC limit for drivers over 21 in California?

Answer: B — 0.08%

The legal Blood Alcohol Concentration (BAC) limit for drivers over the age of 21 in California is 0.08%. This limit is set to help ensure safe driving by discouraging impaired operation of vehicles. Research has shown that at a BAC of 0.08%, drivers are significantly more likely to experience impaired judgment, reduced coordination, and slower reaction times, which increases the risk of accidents. This legal standard applies to all drivers aged 21 and older; if a driver's BAC is measured at or above this threshold, they can be cited for driving under the influence (DUI). The purpose of establishing a specific BAC limit like 0.08% is to promote road safety and reduce alcohol-related accidents, encouraging responsible drinking habits among the driving population.