Final answer:
An operation should notify customers it serves TCS food with a disclaimer on the menu, stating the risks of consuming raw or undercooked items.
Step-by-step explanation:
To ensure the safety and awareness of customers, an operation that serves menu items with raw or undercooked TCS food should notify its customers by providing a disclaimer on the menu. This notification is usually presented as a footnote or beside the menu item that is served raw or undercooked, and it usually states that consuming raw or undercooked meats, poultry, seafood, shellfish, or eggs may increase the risk of foodborne illness. Other methods of notification, like nutritional information, verbal informing, or larger portion sizes, are not deemed sufficient for this specific purpose.