Final answer:
BAC stands for Blood Alcohol Concentration and refers to the amount of alcohol present in a person's bloodstream.
Step-by-step explanation:
BAC stands for Blood Alcohol Concentration. It refers to the amount of alcohol present in a person's bloodstream. BAC is measured as a percentage and is used to determine a person's level of alcohol intoxication. Different BACs have different effects on the body, and tolerance to alcohol can vary between individuals.