A federal system is one where

- constitutional authority is unlimited.

- constitutional authority is divided between a national government and state governments.

- constitutional authority is centralized in a national government.

- constitutional authority is decentralized, only residing in state governments.

- constitutional authority is divided among multiple branches of the national government.

Option B.

Explanation:

Constitutional authority is divided between a national government and state governments, is the right answer.

Federalism is a form of government in which the power of a nation is distributed into two; the central governing government and constituent units (states). The democratic rules and organisations in which the endowment to administer are apportioned between national and state governments form the basis of Federalism. This notion of government emerged out of the dissatisfaction with the Articles of Confederation and the making of the Constitution.