Which East African "city-state region" became the most prosperous city on the Swahili coast by controlling the flow of gold from southern Africa?
O Zanzabar
O Kilwa
O Katanga
O Malindi

A.) Zanzabar

Explanation:

Zanzabar was nothing short of prosperous during this time, and all other options either didn't prosper at all, or prospered less than Zanzabar!

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.

it's no easy i swear it's hard