Final answer:
BAC stands for Blood Alcohol Content, which measures alcohol concentration in the bloodstream, affecting driving ability. The correct answer is option a).
Step-by-step explanation:
The acronym BAC stands for Blood Alcohol Content, which is a measurement of the concentration of alcohol in a person's bloodstream. This is a crucial factor when considering driving ability because the higher the BAC, the more impaired a driver is likely to be.
The immediate effect of alcohol on a person depends on their BAC, which varies based on individual characteristics like age, sex, and health conditions, even among individuals who consume the same amount of alcohol. Legally, a BAC of 0.08% by volume is often considered the threshold for being legally impaired to drive in many US states.
Different BAC levels are associated with varying degrees of impairment, and the Breathalyzer is a common device used to measure BAC.