The Solomon three-control-group research design helps to eliminate which of the following?

If the same people sometimes vote on the basis of their religion and sometimes vote on the basis of their wealth, it is an illustration of __________

a. additive cleavages b. cross-cutting cleavages c. polarizing cleavages e. reinforcing cleavages

______ in politics is the philosophy that ideas should be judged on the basis of their practical results rather than the purity of their principles

A) ?Pragmatism B) ?Idealism C) ?Conservatism D) ?Liberalism