Which must be cleaned and sanitized, as opposed to just cleaned and rinsed?

The correct answer is prep tables, as these surfaces are directly involved in food preparation and require the highest standard of cleanliness to prevent foodborne illness. Cleaning alone removes dirt and debris, but sanitizing involves applying a solution that kills harmful pathogens, ensuring that any residual bacteria from raw foods or spills are eliminated before other ingredients are prepared on the table.

In contrast, kitchen walls and storage shelves, while still needing regular cleaning, do not come into direct contact with food products as frequently as prep tables do. Therefore, they may only require cleaning and rinsing to maintain a sanitary environment. Similarly, garbage containers primarily need to be cleaned regularly to manage waste and odor, but the level of sanitization required is not as stringent as that for surfaces that handle food directly. Sanitization of prep tables is crucial for food safety, making it the right focus for thorough cleaning and sanitization practices.