At what Blood Alcohol Concentration (BAC) does a person typically become unconscious?

Answer: C — 0.25%

A Blood Alcohol Concentration (BAC) of 0.25% is the threshold at which a person typically experiences significant impairment of cognitive and physical functions, leading to a higher risk of unconsciousness. At this level, individuals may have diminished control over motor functions, impairments in judgment, and loss of functional awareness, which can ultimately result in them losing consciousness. It's important to note that at BAC levels above this point, particularly as one approaches 0.30% and beyond, the risk of life-threatening alcohol poisoning increases significantly. The body struggles to manage such high levels of alcohol, leading to severe physiological responses that often result in a loss of consciousness. Understanding these effects is crucial for bartenders and servers, as they must be aware of how alcohol affects patrons at various levels of consumption to promote safety and responsible serving practices.