Which of the following foods are required to be processed by HACCP systems?

The correct answer signifies that HACCP systems are required for a broad range of food categories, specifically meat, poultry, juice, and fish products. HACCP (Hazard Analysis and Critical Control Points) is a systematic approach to food safety that identifies specific hazards and measures for their control to ensure the safety of food throughout the production process.

Meat and poultry are subject to USDA regulations that mandate the implementation of HACCP systems, ensuring that any potential hazards specific to these products are effectively managed. Juice products are also included because they can pose unique safety risks, particularly with pathogens like E. coli or Salmonella, and thus require proper hazard analysis and management. Additionally, fish products are included due to the risks associated with seafood, which can lead to foodborne illnesses if not properly handled.

This comprehensive requirement ensures that a wide variety of high-risk foods targeted by these regulations are processed safely, minimizing public health risks. The other options are overly restrictive or limited in scope, failing to capture the full range of products that require such oversight. This underscores the importance of a HACCP system, as it is essential for various key food categories rather than being isolated to just one or two.