Which of the following foods is at risk for bacterial growth and needs time-temperature control for safety?

• A. Leafy greens that have been cut, shredded, sliced, chopped, or torn
• B. Whole apples
• C. Salt
• D. Water

Answer: (A)

Time-temperature control for safety applies to foods that can rapidly support bacterial growth when left in the temperature danger zone. Cut leafy greens fit this description because slicing or shredding damages the protective surface, increases exposed moisture, and provides more nutrients for any bacteria present. This combination makes them highly perishable and able to multiply quickly if not kept cold or handled hygienically, so they require strict time-temperature control from reception through serving.

Whole apples stay relatively resistant because their intact skin helps limit moisture loss and microbial access, and their natural acidity slows growth, so they’re not treated as high-risk for rapid bacterial proliferation in ordinary handling. Salt acts as a preservative by reducing water activity, which inhibits bacterial growth, rather than providing a medium for growth. Water itself isn’t a food and doesn’t supply nutrients for bacteria the way a fresh-cut food does, so it isn’t classified as needing time-temperature control on the same basis.