Answer:
have received its powers through the delegation doctrine.
Step-by-step explanation:
The delegation doctrine establishes that Congress has the power to delegate authority to federal administrative agencies (e.g. FDA) which enables them to create rules regulating certain specific activities, and to provide oversight regarding the specific activities that they regulate.
In order to create this federal agencies and to delegate them authority, Congress must pass enabling legislation by which the agency is created. This legislation must specify the agency's name, purpose, functions and the specific powers being delegated to them.