Final answer:
Under the zero tolerance law, drivers less than 21 with a BAC of .02 or above may lose their license.
Step-by-step explanation:
The correct answer is A. under zero tolerance law.
In the United States, drivers under the age of 21 are subject to a zero tolerance policy for alcohol. This means that they cannot have any measurable blood alcohol concentration (BAC) while driving, regardless of how low the BAC may be. So, if a driver under 21 has a BAC of .02 or above, they may lose their license under the zero tolerance law.
For example, if a 19-year-old driver is pulled over and breathalyzed, and their BAC is found to be .02 or above, they can face the consequences of losing their license.