Which of the following is included under civil law concerning alcohol sales?

Negligence in selling alcohol leading to injury falls under civil law as it directly relates to the legal responsibility that establishments and individuals have to ensure safe alcohol service practices. If a situation arises where alcohol is served irresponsibly, resulting in harm to an individual or others, the party that served the alcohol may be held liable for damages under civil law. This liability can arise from actions that demonstrate a lack of reasonable care, meaning that if a person or establishment fails to take appropriate precautions when serving alcohol, and someone is injured as a result, they can face civil consequences.

In contrast, other options like providing free drinks at an event, refusing service based on a customer's behavior, and documenting sales during peak hours do not inherently involve negligence or result in civil liability. Providing free drinks can be part of promotional tactics and does not imply negligence unless it is done irresponsibly. Refusing service based on a customer's behavior usually aligns with responsible service practices and is often encouraged to prevent overconsumption. Documenting sales is an operational aspect that does not involve liability concerns directly related to the sale of alcohol under civil law.