Final answer:
DoDI 6055.01 is the standard that specifies how federal and DoD regulations are applied to the Defense Health Agency (DHA). The correct answer is option C.
Step-by-step explanation:
The standard that establishes how federal and Department of Defense (DoD) regulations apply specifically to the Defense Health Agency (DHA) is DoDI 6055.01. This regulation documents the DoD's safety and occupational health programs, which the DHA must adhere to as a part of the DoD.
While the Occupational Safety and Health Act of 1970 (PL 91-596) set forth the creation of the Occupational Safety and Health Administration (OSHA) and its authority to promulgate standards for worker safety, this does not apply specifically to the DHA in the context of the question.
Executive Order 12856 deals with federal agency operations and environmental protection, which is not directly relevant to the DHA's specific operating procedures.