Which of the following is NOT listed as an example of a potentially hazardous lunch item?

• A. Milk
• B. Tuna salad
• C. Bread
• D. Cheese

Answer: (C)

Potentially hazardous foods are those that can support the rapid growth of bacteria if they’re not kept at the right temperatures. Foods of animal origin or mixtures with perishable ingredients—like dairy products and mayonnaise-containing tuna salad—have enough moisture and nutrients for bacteria to multiply quickly when left out or not refrigerated, so they require time-temperature control to stay safe.

Bread, by contrast, has very low moisture activity, so it doesn’t provide a favorable environment for bacterial growth. That’s why it isn’t classified as potentially hazardous, even though it can become stale or moldy over time. So the perishable items—milk, tuna salad, and cheese—need careful temperature control, while bread does not fit that same risk category.