What does BrAC measure?

BrAC, or breath alcohol concentration, specifically measures the percentage of alcohol in a person's breath, which is reflective of the alcohol concentration in their blood. This measurement is obtained through a breath-testing device, which estimates blood alcohol content (BAC) based on the amount of alcohol in the breath. This method is commonly used in law enforcement for determining an individual's level of intoxication while driving or operating machinery.

The other options do not accurately describe what BrAC measures: the first option refers to alcohol levels in urine, the third addresses overall consumption rather than concentration, and the fourth involves blood tests rather than breath analysis. Each of these alternatives focuses on different methods for assessing alcohol levels or consumption, underscoring the unique role of BrAC in evaluating intoxication through breath samples.