Final answer:
The USDA, EPA, and FDA are the agencies involved in reviewing and regulating genetically engineered foods such as vitamin-enhanced rice, each focusing on different aspects such as agriculture, environmental safety, and food safety respectively.
Step-by-step explanation:
Regarding the supervision of genetically engineered (GE) foods, such as rice that is genetically modified to produce higher amounts of vitamins, multiple agencies are involved in the regulatory process under the Coordinated Framework for the Regulation of Biotechnology (CFRB) established in 1986. The agencies responsible for reviewing and regulating these products are the U.S. Department of Agriculture (USDA), the Environmental Protection Agency (EPA), and the Food and Drug Administration (FDA). The USDA oversees the agricultural aspects, the EPA is responsible for environmental safety including pesticide regulation, and the FDA evaluates food safety and nutritional aspects.