What is one result of the Supreme Court's decision in the McCulloch v. Maryland case? A. State governments gained the power to operate their own banks without the approval of the federal government. B. State governments gained the power to submit amendments to the Constitution. C. The federal government could declare a state law illegal if it went against the Constitution. D. The federal government gained the power to tax, which was something only the states had been allowed to do.

The correct answer is C. As a result of the Supreme Court's decision in the McCulloch v. Maryland case, the federal government could declare a state law illegal if it went against the Constitution.

Explanation:

McCulloch v. Maryland was a decision of the United States Supreme Court. The state of Maryland attempted to prevent the operation of a subsidiary of the Second Bank of the United States by imposing a tax on all banknotes of banks not based in Maryland. The Second Bank of the United States was the only bank then present in the state that had not been founded in it. It was recognized in the Supreme Court's decision that the state had specifically directed the Bank of the United States. The Court invoked the Theory of Implicit Powers of the Constitution, which allowed the Federal Government to enact laws that are not expressly provided for in the Constitution, from a list of expressed powers, provided that such laws are useful for Congressional powers under the Constitution.

The case cited is a milestone in world history, as it marked the beginning of the theory of implicit powers, and is a milestone in the expression of the powers of the union towards its member states.