Which describes a city-state?
a. a region of farmers who organize the local trade center
b. an urban center with a government and defensive fortifications
c. a city whose government answers to a state or provincial government
d. an independent city with political control over the surrounding area
"d. an independent city with political control over the surrounding area" would be the best option, since in these political structures usually a large amount of land is ruled by a small amount of land.
