What is the required temperature for the hotbox?

The required temperature for the hotbox being set at 150 degrees or above is important for ensuring food safety and quality. This temperature threshold helps to keep food out of the "danger zone," which is typically defined as temperatures between 41 degrees and 135 degrees Fahrenheit, where harmful bacteria can multiply rapidly.

By maintaining the hotbox at or above 150 degrees, food items, particularly those that are already cooked, can be safely held for serving without becoming a health risk. This temperature also helps preserve the texture and flavor of the food, making sure it meets the standards of quality expected by customers.

The other choices either set the temperature too low or do not clarify a requirement; therefore, they would not ensure the safety and quality of the food served.