What's legalism? A. A philosophy that follows the beliefs of the sage Confucius
B. A system of government where people have the power
C. A system of government where power is shared with local rulers
D. A philosophy of government that advocates for a strong central government

A philosophy of government that advocates for a strong central government

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.

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."