Final answer:
BAC stands for blood alcohol concentration and represents the amount of alcohol present in a person's bloodstream. It is used to measure alcohol intoxication and determine if a person is under the influence.
Step-by-step explanation:
The term BAC stands for blood alcohol concentration (content). It refers to the amount of alcohol present in a person's bloodstream. BAC can vary for each individual and is influenced by factors such as age, sex, and overall health. It is commonly used as a measure of alcohol intoxication and is often legally defined to determine if a person is under the influence of alcohol.