Answer:
B. The Supreme Court affirms a state court decision
Step-by-step explanation:
B. The Supreme Court affirms a state court decision is not an example of checks and balances. The concept of checks and balances is a fundamental principle of the United States government, and it is designed to ensure that no one branch of government becomes too powerful. This is achieved through a system of checks and balances, in which each branch of government is given certain powers that can be used to limit or check the power of the other branches. The power of the president to veto a bill, the power of the Supreme Court to declare a law unconstitutional, and the power of the senate to ratify a treaty are all examples of checks and balances. In contrast, the Supreme Court affirming a state court decision is not an example of this principle, as it is simply the Court upholding a decision made by another branch of government.