The Writers of the Constitution Established a Federal System of Government

The writers of the Constitution established a federal system of government in part because

A) the states already existed as established entities and had to be preserved.
B) a federal government alone would never be able to command the identity or loyalty of its citizenry.
C) Locke and Montesquieu had concluded it was superior to other systems of government.
D) the British political system was based on the federal principle.
E) the states would be valuable sources of revenue for a federal government.