The principle that state governments and the federal government work together to develop national policies is known as_.

A. the separation of power

B. the division of powers

C. direct democracy

D. cooperative federalism

The correct answer is D. The principle that state governments and the federal government work together to develop national policies is known as cooperative federalism.

Explanation:

Cooperative federalism is called the federal political organization system in which the various second-order political entities (the states in the United States) collaborate in the national organization, public administration, legislation and judicial organization with the federal government, which is the first-order political entity of the nation.

That is, each level of the state (federal, state or local) does not act in isolation, but does so in an integrative and collaborative way with the different levels, so that its actions result in the greatest possible benefit for its own political level and for others, which ultimately represents the greatest possible benefit for the citizens of the United States of America.