Concept:Social developments under colonial rule are lasting changes that affected African societies, such as new systems of law, trade, and communication.
Explanation:Trade relations, a common legal system, and the emergence of the press were introduced or promoted by colonial rule as part of social change.
Exploitation was not a social development; it was a harmful economic and political consequence of colonialism.
It involved taking resources and wealth from Africa, such as when Lever Brothers took over the Niger Company in 1929.
Therefore, exploitation does not belong in the list of social developments.
Answer:D. Exploitation