Which enlightenment thinker wrote that people in society are bound to one another by an implicit 'social contract'?
a. voltaire
b. marie arouet
c. jean-jacques rousseau
d. thomas paine

Why were the chang and xi rivers important to china’s development? a. they keep invaders out. c. they kept china isolated. b. they provided a route for ships to travel inland. d. they provided boundaries for the different political sections