The geography of the North China Plain had which effect on early Chinese civilizations?
A. It helped many religions spread throughout China.
B. It prevented China from growing its own food.
C. It protected China from foreign attacks.
D. It made China the center of world trade.
SUBMIT

I believe the answer is C. It protected China from foreign attacks.

Explanation:

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.