Which political theory defines a different responsibilities for each branch of government?

A popular sovereignty

B Limited government

C separation of powers

D federalism

C. Separation of Powers

Explanation:

The political theory of Separation of Powers establishes the division of power, scope and responsibilities of the government into three branches: The judicial, the Executive and the Legislative, in order to prevent the government from being controlled by one branch, and to set the basis for the system of Checks and Balances, a system in which all branches oversee, check and limit the actions and the scope of each other. The U. S. government and many other governments are based under this principle.

C, separation of powers.

it's c because this theory basically says that one part of the government can't become all powerful.