Final answer:
The minimum temperature for holding hot food in a self-service area is 135°F (57°C) to ensure safety and prevent bacterial growth.
Step-by-step explanation:
Hot food must be maintained at safe temperatures to prevent the growth of bacteria and ensure it remains safe to eat. According to food safety guidelines, hot food should be kept at a temperature that is too high for most bacteria to multiply rapidly. 135°F (57°C) is the minimum temperature at which hot food should be held in a self-service area, aligning with the options provided. Food items should be regularly monitored with a thermometer to confirm they are being kept at this safe holding temperature.