The time period within which the Great Kingdoms of Africa existed was the years 750 - 1500s.
Answer : Option D
<u>Explanation:</u>
The Great Kingdoms of the African history have prevailed the soil of Africa during the period of 700 to 1500s as namely, Sahelian Kingdom, Kingdom of Nri, Oyo Empire, Benin Empire, Kongo Kingdom, Luba Empire, Mutapa Empire, Zulu Kingdom. These aforesaid Kingdom occupied the South Africa with West Africa and Central Africa mostly.
The East African great kingdoms involve Kitara Empire, Buganda Empire. The horn of Africa had Kingdom of Aksun, Belzim, Jarin, Tankish and so on. Conclusively, Songhai Kingdom was the Greatest of all and all major kingdom prevailed during the 750 to 1500s.