During the period of European imperialism in Africa, territorial borders were drawn with little regard to the location of existing cultures. What was one result of the placement of these borders?

A.
Most African cultural groups adopted the customs of neighboring tribes.
B.
Most African cultural groups found ways to stay in contact with each other.
C.
Many members of African cultural groups were forced to adopt foreign customs.
D.
Many members of African cultural groups were cut off from contact with each other.

D. Many members of African cultural groups were cut off from contact with each other.