Federal administrative law is published in the:

Federal administrative law is formulated by federal agencies and includes rules, regulations, orders, and decisions that govern various aspects of federal policy and public interaction with agencies. Both the Federal Register and the Code of Federal Regulations serve key roles in this process.

The Federal Register is the official daily publication that provides a means for federal agencies to announce proposed and final regulations, notices, and other important legal documents. By publishing these materials, the Federal Register ensures transparency and public access to governmental actions.

The Code of Federal Regulations (CFR) is a compilation of all the administrative rules and regulations promulgated by federal agencies. It is organized into titles based on subject matter and is updated annually. This structured compilation makes it easier for individuals to locate specific rules and regulations.

Since both the Federal Register and the Code of Federal Regulations are integral to the publication and organization of federal administrative law, the correct answer incorporates both of these vital resources. This combination reflects the comprehensive framework through which administrative law is disseminated, making option D the most accurate response.