What system's foundations include purchasing food from unsafe sources and practicing poor personal hygiene?

The correct answer relates to the principles underlying a system that emphasizes the importance of safe food handling practices. In this case, the option refers to the Hazard Analysis Critical Control Point (HACCP) system, which is designed to identify and mitigate risks in food production and service environments. A key focus of HACCP is preventing potential hazards that can arise from poor practices, which includes sourcing food from unsafe sources and maintaining good personal hygiene.

HACCP establishes critical control points in the food preparation process, where hazards can be controlled or eliminated. Therefore, if a facility engages in purchasing food from unsafe sources or if employees practice poor personal hygiene, these actions would violate the core principles of HACCP, potentially leading to foodborne illnesses. This system essentially relies on proactive measures to ensure that food is safe from the very beginning of its journey to the consumer, which includes assessing suppliers' practices and implementing personal hygiene standards among food handlers.

The other options mentioned in the question are related to food safety but do not directly represent a system whose foundations include the specific practices stated. Understanding these principles helps food safety managers and workers recognize the importance of sourcing and hygiene as integral components of maintaining food safety.