Final answer:
In Ohio, it is unlawful for a driver 21 or above to operate a vehicle with a blood-alcohol concentration (BAC) of 0.08% by volume.
Step-by-step explanation:
In Ohio, it is unlawful for a driver 21 or above to operate a vehicle with a blood-alcohol concentration (BAC) of 0.08% by volume.
This means that if a driver's BAC is 0.08% or higher, they are considered legally intoxicated and it is illegal for them to drive in Ohio.
A BAC of 0.08% means that there is 0.08 grams of alcohol per 100 milliliters of blood in the driver's system.