The olmec calendar was based on

a) the crops they grew

b) the movement of earth

c) the changing tides

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.

yes

explanation:

i know social security wasn't one.

explanation:

hope my answer has you!