Gloves must be changed at least once every (blank) hours?

The correct choice indicates that gloves should be changed at least once every four hours during food preparation and service. This guideline is based on best practices in food safety, which aim to minimize the risk of cross-contamination and ensure a hygienic environment.

Wearing gloves for extended periods can lead to the accumulation of bacteria or other pathogens on the surface of the gloves due to handling food, touching surfaces, or simply from the natural oils and moisture from the hands. Changing gloves every four hours helps maintain a standard of cleanliness and reduces the potential for foodborne illnesses, which can arise from prolonged exposure to contaminants.

This time frame also aligns with health regulations and food safety training, reinforcing the importance of proactive measures in maintaining food safety. By adhering to this guideline, food handlers can ensure they are providing safe and hygienic food service.