What are the ancient Romans known for developing? A. roads and bridges to make travel easier 0 B. universal public education for boys and girls o C. gun powder that allowed them to create guns D. windmills that could grind grain and pump water

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."

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explanation:

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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.