What is against the law regarding the sale of liquor?

The key aspect that makes selling liquor to minors and intoxicated persons against the law is the protection of public safety and health. Minors are not legally allowed to consume alcohol, as it can have detrimental effects on their development and health. Additionally, selling alcohol to intoxicated individuals poses significant dangers, as it can lead to further impairment and increase the potential for accidents, harm, or illegal behavior.

Regulations are in place to prevent these scenarios, emphasizing the responsibility of businesses to not only comply with legal statutes but also to contribute to the welfare of the community. Vendors are trained to recognize signs of intoxication and are held accountable for their actions, reinforcing the expectation that they will refuse service when necessary to prevent harm.

The other options reflect actions that are legally permissible under certain conditions, which is why they do not align with the violation represented by selling to minors and intoxicated persons.