Final answer:
For drivers under the age of 21, any detectable amount of alcohol in their system is considered illegal. It is important for young drivers to understand the legal consequences and risks of drinking and driving.
Step-by-step explanation:
In most countries, including the US, it is illegal for a driver under the age of 21 to operate a vehicle with any detectable blood alcohol concentration (BAC). This means that even a small amount of alcohol in their system can result in a DUI charge. The legal limit for drivers over the age of 21 varies but is generally set at 0.08% BAC.
For drivers under 21, however, there is a zero-tolerance policy in place, meaning that any detectable amount of alcohol in their system is considered illegal.
It's important for young drivers to understand the legal consequences and risks associated with alcohol consumption and driving.