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: Washington's BAC limit is 0.08% for drivers 21 and over (0.02% for drivers under 21). The THC limit for drivers 21+ is 5 ng/mL.