which document is referred to as the "supreme law of the land?
a us constitution
b. bil of rights
c declaration of independence
d. first amendment
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The US Constitution is referred to as the supreme law of the land.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.