Final Answer:
It is illegal for individuals over age 21 to drive with a blood alcohol content (BAC) percentage of b. .08%. (option b)
Step-by-step explanation:
In most jurisdictions, a BAC of .08% is the legal limit for individuals over age 21 to operate a vehicle. The BAC is a measure of the concentration of alcohol in a person's bloodstream. A BAC of .08% means that there is .08 grams of alcohol per deciliter of blood. This threshold is widely accepted as the point at which alcohol impairs a person's ability to drive safely, leading to an increased risk of accidents.
The establishment of a legal BAC limit serves as a standardized measure for identifying impaired driving and promoting public safety. The .08% limit is based on extensive research and analysis of the effects of alcohol on cognitive and motor functions. It represents a balance between acknowledging individual freedom and safeguarding public well-being. Law enforcement uses breathalyzer tests or blood tests to determine an individual's BAC during traffic stops or DUI (Driving Under the Influence) investigations.
Driving with a BAC above the legal limit not only poses a risk to the driver but also endangers other road users. Penalties for exceeding the legal limit may include fines, license suspension, mandatory alcohol education programs, and, in some cases, imprisonment. Adhering to the established BAC limit is a crucial component of responsible and safe driving behavior.(option b)