The answer is A, checks and balances system. The power of courts determines what the government does, in accords with what the Constitution provides.
Explanation:
Getting someone who stand in your favour
Principle of unity:
The phrase "WE, THE PEOPLE" is of singular importance because it stipulates that the power and authority of the federal government of the United States of America does not come from the various states or the people of the various states, but from an entity that is identified as the People of the United States of America, with the Constitution serving as a compact or contract between the People of the United States of America, the various states, and the new entity: the federal government of the United States of America. The importance of this language lies in the idea that the government does not derive its power only from the various states.
