The correct answer is C. Forming three branches of government in the United States.
Step-by-step explanation
The separation of powers is a characteristic political principle of constitutional governments that establishes that public power should be divided into three main organs: legislative (to create laws), executive (Execute laws), and judicial (Judge actions based on laws). This principle is based on the idea that the balance of powers between various bodies allows a balanced and vigilant government to avoid power-grabbing and corruption. According to this, the idea of separation of powers allowed the United States to create three branches of public power representing each of the powers (legislative, executive, and judicial) being one of the characteristic features of constitutional government. So the correct answer is C.