1. It is illegal for a driver age 21 or older to operate a vehicle with a BAC of ____ or higher.
- 0.05%
- 0.08%
- 0.10%
Explanation: In California, drivers 21 and older may not drive with a BAC of 0.08% or more. The limit is 0.01% for drivers under 21 and 0.04% for commercial drivers.