Which of the following statements regarding coolers is true?

The statement that coolers help maintain food at a safe temperature is correct because one of the primary functions of coolers in food storage is to ensure that perishable items remain at temperatures that inhibit the growth of harmful bacteria. Proper refrigeration slows down microbial activity, thereby preserving the quality and safety of food.

In commercial settings like restaurants or food service operations, coolers are typically set to temperatures above freezing, often between 32°F to 41°F, which is ideal for keeping food safe while maintaining its integrity. This controlled environment helps ensure food stays fresh and prevents spoilage or contamination.

The other statements involve misconceptions about the functions and requirements of coolers. For instance, coolers are not primarily designed for quickly cooling hot foods; that's the function of blast chillers. Additionally, while it’s important for coolers to maintain safe temperatures, they do not need to operate at freezing levels and do not have to hold food at temperatures below 32°F for safe storage.