Answer:
B. Checks and Balances.
Step-by-step explanation:
The system of Checks and Balances is the system whereby all three branches of the government (the Legislative, Executive, Judicial) has the control or power to oversee, limit and check each other's powers.
Through this principle each branch can respond to the action of the other, for example, the Legislative branch has the power to create and pass a bill, however, before the bill can become a law, it first has to be sent to the President for signature. If the President vetoes the law, the Congress then has the power to override the Presidential veto if 2/3 of the Congressmen vote in favor.