The geography of the north china plain had which effect on early chinese
civilizations?

a. it made china the center of world trade.
b. it protected china from foreign attacks.
c. it many religions spread throughout china.
d. it prevented china from growing its own food.

Which of the following accurately describes the workforces of the united states and canada? a. most of the workforce in the united states and canada is employed in the service industry. b. most of the workforce in the united states and canada is employed in the educational field. c. most of the workforce in the united states and canada is employed in manufacturing and mining. d. most of the workforce in the united states and canada is employed in agriculture.