Which of the following actions is illegal concerning the sale of alcohol?

Serving alcohol to minors is illegal in most jurisdictions because it poses significant health and safety risks to young people who may not have the maturity or experience to handle alcohol responsibly. Laws are in place to protect minors from the potential dangers of intoxication, such as impaired judgment and risky behaviors, and to discourage the normalization of drinking at a young age.

Establishing a legal drinking age of 21 has been implemented to help reduce alcohol-related accidents and issues within younger populations. Thus, bartenders and servers must diligently check identification to ensure that they are serving only those who are legally permitted to consume alcohol, reinforcing community safety and legal compliance.

On the other hand, serving customers at approved times, serving alcohol to adults over 21, and offering discount drinks are generally within legal bounds, provided they adhere to specific local laws and regulations regarding alcohol service.