A.sharing of power between state and national governments
B.supremacy of the powers of the national government
C.sharing of power between branches of government
D.supremacy of the powers of state governments
fed·er·al·ism ˈfed(ə)rəˌlizəm/Submit noun the federal principle or system of government. "the politics of federalism in Canada" the principles of the Federalist Party. noun: Federalism in Canada, support of confederation in opposition to Quebec separatism.