What prevents the power of the state from making a law that conflicts with a federal law?

bicameral legislature
checks and balances
shared powers
supremacy clause

The supremacy clause is the power that prevents the state from making laws that will conflicts the federal law.

Explanation:

The supremacy clause is known to be the highest law in the United State form of legal system as a country. This law states that every state Judge must follow strictly the federal law in a situation where there is a conflict between the federal and state laws.

It must be noted that the farmers instigated the conflicts that resulted in the supremacy clause being inserted into the constitution.

The supremacy clause enables the constitution to stand tall above all other forms of laws that exist in the country.

the answer would be c