Final answer:
The core offices at the EPA that are fundamental to its mission include the Office of Policy, Office of Research and Development (ORD), Office of Air and Radiation (OAR), and Office of General Counsel (OGC). Therefore, the correct option is A, B, C, D.
Step-by-step explanation:
The core offices at the Environmental Protection Agency (EPA) include several offices that are fundamental to the agency's mission of protecting human health and the environment. The offices mentioned in your question—Office of Policy, Office of Research and Development (ORD), Office of Air and Radiation (OAR), and Office of General Counsel (OGC)—are indeed among the core offices within the EPA.
The Office of Policy is integral in developing the agency's policies and provides cross-agency direction. The ORD is the scientific research arm of the EPA, supporting high-quality research to improve the basis for decisions on environmental issues. The OAR is responsible for implementing the Clean Air Act and developing national programs, technical policies, and regulations for controlling air pollution and radiation exposure.
Lastly, the OGC serves as the chief legal advisor to the agency, providing legal assistance that may include enforcement of environmental laws, interpretative guidance, and coordination of international legal matters.