As trade intensified between Africa and Asia, prosperous city-states flourished along the eastern coast of Africa. These included Kilwa, Sofala, Mombasa, Malindi, and others. The city-states traded with inland kingdoms like Great Zimbabwe to obtain gold, ivory, and iron.
As far as I remember, this one was not a result of the Industrial Revolution in Europe: <span>D. the decline of Europe’s large cities. I believe it's correct one.</span>
