Final answer:
Under 21 years old means you cannot carry alcohol in a vehicle without supervision.
Step-by-step explanation:
Under 21 years old means you cannot carry beer, liquor, or wine inside a vehicle unless accompanied by a parent or other person specified by law, with the container full and unopened.
The drinking age in the United States is set at 21 years old by the National Minimum Drinking Age Act of 1984. This law required states to raise their drinking age to 21 or face a reduction in federal highway funds.
The intention behind this law is to prevent young people from consuming alcohol, as it is believed that they are more susceptible to the negative effects of alcohol and may engage in risky behavior.