Final answer:
BAC stands for blood alcohol content and refers to the concentration of alcohol in a person's bloodstream. It is measured through blood or breath testing and is used to determine alcohol intoxication levels.
Step-by-step explanation:
The acronym BAC refers to blood alcohol content, which is a measure of the concentration of alcohol in a person's bloodstream. It is commonly used to determine alcohol intoxication levels for legal purposes, such as driving under the influence. BAC can be measured through blood or breath testing and is influenced by factors like the number of alcoholic drinks consumed and the rate at which the body metabolizes alcohol.