What must an off-premise manager ensure regarding liquor sales?

The responsibility of an off-premise manager includes ensuring that all liquor sales comply with legal age restrictions. This means that they must verify that customers are at least 21 years old before selling them any alcoholic beverages. This regulation is crucial for promoting responsible drinking and protecting public health and safety. Selling alcohol to individuals underage poses significant legal consequences for the establishment and can contribute to broader societal issues related to underage drinking.

The other options provided, while they may contain some elements related to liquor sales, do not address the pivotal requirement of ensuring customers are of legal drinking age, which is central to responsible liquor sales management.