What single item can a cashier offer to a customer if it wasn't ordered?

The correct choice highlights how a cashier can enhance customer satisfaction by offering items that complement the main order, even if they weren't specifically requested. In the context of fast food, a drink is a common item that customers often desire but may not always think to order. It pairs well with almost any meal and can be a quick upsell that customers appreciate.

Offering a drink can also engage the customer in a conversation about beverage preferences, which promotes interaction and can lead to additional sales. The opportunity to add a drink, particularly at a promotional price or as part of a meal deal, presents a strategic choice for cashiers, as it often leads to higher overall sales for the store.

Other options, such as cake or salad, might be less universally appealing and could require more specific context regarding customer preferences or meal types. A side dish could also enhance a meal, but drinks are typically the most common upsell opportunity during a transaction, making this choice particularly effective in a fast-food environment.