Which clause ensures that national law takes precedence over conflicting state law?

• A. Full Faith and Credit Clause
• B. Supremacy Clause
• C. Commerce Clause
• D. Necessary and Proper Clause

Answer: (B)

The main idea here is that federal law can override state law when they clash, thanks to the Supremacy Clause. This clause, in Article VI, makes the Constitution, federal laws made under it, and treaties the supreme law of the land, binding on every state. So if a state passes a law that contradicts a federal law, the federal rule wins and the state rule cannot stand in that area. This creates a consistent national framework and is a principle the courts enforce, as shown in cases like McCulloch v. Maryland. The other clauses—Full Faith and Credit, Commerce, and Necessary and Proper—play important roles in different ways, but they don’t establish the rule that federal law automatically eclipses conflicting state law.