Correct answer: The supreme law of the land is US or federal law.
Explanation:
The Supremacy Clause ensures that the Constitution and laws made by the United States in accord with the Constition always stand as the supreme law of the land and the foundation of government. The Supremacy Clause establishes that the US Constitution is above any state law enacted or other law that is passed. Any other laws and government actions must be in accordance with the nation's Constitution. The Supremacy Clause is the second clause of Article VI of the Constitution. It is stated as follows: