Final answer:
In most countries, including the US, it is illegal to drive under the influence of alcohol or other drugs. The legal blood alcohol concentration (BAC) limit is typically 0.08% by volume in most US states. If a driver's BAC exceeds this limit, they can be charged with driving under the influence (DUI).
Step-by-step explanation:
In most countries, including the US, it is illegal to drive under the influence of alcohol or other drugs. The legal blood alcohol concentration (BAC) limit is typically 0.08% by volume in most US states. If a driver's BAC exceeds this limit, they can be charged with driving under the influence (DUI). The Breathalyzer, a portable device, is often used by law enforcement to measure a person's BAC by analyzing the ethanol concentration in their breath.