Final answer:
The FDA is responsible for enforcing the Federal Food, Drug, and Cosmetic Act, including inspecting food products and factories, as well as monitoring interstate shipping of shellfish. Therefore, the correct answer is 'I, II, III, and IV'.
Step-by-step explanation:
The U.S. Food and Drug Administration (FDA) has multiple responsibilities to protect public health. It is authorized to enforce the Federal Food, Drug, and Cosmetic Act, which includes inspecting factories and enforcing laws to ensure the purity, effectiveness, and truthful labeling of food, drugs, and cosmetics. The FDA also monitors the interstate shipping of shellfish as part of its regulatory duties, and it works in conjunction with other federal and local agencies to conduct safety regulations and inspections.
Given this information, the correct answer would be: 'I, II, III, and IV'—meaning that the FDA conducts inspections of meat, poultry, fish, eggs (I), inspects factories (II), enforces the Food, Drug and Cosmetic Act (III), and monitors interstate shipping of shellfish (IV).