Answer: D. Federal Government
Step-by-step explanation:
The Federalist system of the United States divides power between the State Government and the Federal Government with the latter having some form of control over the former.
This is the same agreement with the Native Indian tribal governments of the Native Indian nations in the United States. Because they are to be treated as self-governing and sovereign, they can only be negotiated with by the Federal Government and not by State Governments and so this puts them on the same hierarchical position as the state governments.