Final answer:
The FDA is the agency most likely to provide fliers to retailers regarding food safety, as it deals with food regulation and supervision. Option a.
Step-by-step explanation:
The agency most likely responsible for providing a flier to retailers that pertains to the food industry would be the Food and Drug Administration (FDA) option a. The FDA regulates and supervises the safety of foods and is responsible for setting and enforcing hygiene standards for food handling in stores and restaurants. It also oversees the regulatory procedures for food traceability, ensuring food products can be traced back to their point of origin and date of processing, which is crucial in the event of a foodborne disease outbreak.