Concept:Early centres of civilization in Nigeria are historical sites that existed before colonial rule and provide evidence about the earliest Nigerian communities.
Explanation:The notable early centres include the Nok Culture, Ife Civilization, and Benin Kingdom.
These centres reveal the political, social, economic, and religious life of the indigenous people.
Although discoveries such as iron smelting and bronze works were made, they are parts of the broader culture and organisation of the people.
The centres existed long before the transatlantic slave trade and colonial rule began in Nigeria.
They also do not merely trace descendants of specific tribes; instead, they show the general characteristics of precolonial societies.
Therefore, the early centres of civilization primarily reveal the history of precolonial societies in Nigeria.
Answer:D. precolonial societies