In which system of government does ultimate authority rest with regional governments (e. g., state governments) and hardly any power is granted to the national government

In the Confederal system of government

Explanation: A Confederal system of government is a system in which individual states in a country holds the power to that state but are united for purposes of common actions. They are often formed by a treaty with a central government holding little power over the States but are responsible for international relations.

what are the options?