Final answer:
Perishable foods must not remain in the Temperature Danger Zone (TDZ) for more than 2 hours to prevent rapid bacterial growth.
Step-by-step explanation:
Foods must not remain in the Temperature Danger Zone (TDZ) for more than 2 hours. The TDZ refers to the temperature range between 4 and 60 degrees C (40 and 140 degrees F), where bacteria multiply most rapidly. If perishable foods are kept within this temperature range for more than 2 hours, there is a risk of rapid bacterial growth, making the food dangerous to eat.