Who are the four types of people you cannot sell or serve liquor to?

The correct answer identifies specific categories of people that must be protected from alcohol sales and service due to legal and safety concerns. Minors are prohibited from consuming alcohol, and selling to them not only violates laws but also poses risks to their health and safety. People under the influence of alcohol may not be able to judge their capacity to consume more alcohol, leading to dangerous situations, both for themselves and others. Additionally, individuals who are addicted to alcohol are often unable to consume it responsibly, and selling to them can exacerbate their condition. Lastly, restrictions on selling alcohol to those purchasing for a minor help to enforce laws safeguarding underage individuals from accessing alcohol.

The other options include individuals who do not necessarily fit the legal framework regarding alcohol sales. For example, sober individuals and casual drinkers (option B) do not fall into prohibited categories, as they are legally allowed to consume alcohol. Describing tourists (option D) does not pertain to the legal prohibition on alcohol sales, as tourists can legally purchase alcohol unless they fall into other restricted categories. By accurately listing prohibited purchasers, the correct answer emphasizes the importance of responsible alcohol service and the legal obligations that govern it.