Final answer:
Bagged, chopped lettuce may be accepted when its temperature is 40°F (4°C) or lower to prevent bacterial growth and ensure food safety.
Step-by-step explanation:
Bagged, chopped lettuce may be accepted when its temperature is 40°F (4°C) or lower. According to food safety guidelines, perishable foods should be stored at temperatures below 40°F (4°C) to prevent bacterial growth. This is because bacteria multiply most rapidly between 40°F and 140°F (4°C and 60°C), which can make the food dangerous to eat.