Final answer:
Typically, a person loses consciousness at higher BAC levels, around 0.30% or higher.
Step-by-step explanation:
Alcohol intoxication can lead to a person losing consciousness. The level of intoxication is measured by the blood alcohol concentration (BAC), which is the amount of alcohol in the bloodstream. Typically, a person loses consciousness at higher BAC levels, around 0.30% or higher. At this level, excessive alcohol use can cause a complete loss of consciousness. It's important to note that tolerance to alcohol can vary between individuals, so the specific BAC level at which a person loses consciousness may differ.