Final answer:
Leftover foods should be reheated to at least 74°C (165°F) for hot-holding to ensure food safety and prevent bacterial growth.
Step-by-step explanation:
When reheating leftover foods for hot-holding, they should be reheated to at least 74°C (165°F) to ensure that any potential bacteria present are destroyed. This is higher than the options provided, but it is the temperature recommended by food safety guidelines. Perishable foods left in the temperature danger zone of 5°C to 60°C (41°F to 140°F) for more than 2 hours should be discarded to prevent the risk of foodborne illness. Ensuring that leftovers are reheated properly is crucial in preserving food safety and preventing microbial growth.