Answer: Option C
The term "separated institutions sharing power" described the elaborate systems of checks and balances between the branches of government
Explanation: For smooth functioning of government it is essential that the powers and duties of its branches are divided and each branch keeps a control and check on the other branch. To this system Richard Neustadt had called as separate institutions sharing power.
This division of power ensures that no single branch exercises the absolute power or exceeds its power as the other branches keep check on the exercise of the power by each branch. Hence division of powers or sharing of power by the different branches of government is essential tool for limited government.