What is the legal Blood Alcohol Concentration (BAC) limit for drivers aged 21 and over in California?

Answer: B — 0.08%

In California, the legal Blood Alcohol Concentration (BAC) limit for drivers aged 21 and over is set at 0.08%. This means that a driver is considered legally impaired if their BAC measures 0.08% or higher when tested. The regulation reflects efforts to reduce the risks associated with drinking and driving, as higher levels of alcohol in the bloodstream significantly increase the likelihood of motor vehicle accidents due to impaired judgment, coordination, and reaction times. Driving with a BAC at or above this limit can result in fines, license suspension, and even criminal charges, depending on the circumstances and previous offenses. This legal threshold promotes road safety and encourages responsible drinking practices among adults.