The correct answer is D. Arbitrarily formed boundaries caused wars between rival tribes.
Explanation
During the 19th century in Europe, the Industrial Revolution developed a technological, social and economic movement that meant a significant change for humanity, the growth of many factories, the displacement towards large industrial cities, imperialism, among others. When the industrial powers began to colonize African territories, the continent was divided, however, these new borders did not take into account the tribal traditions of the native African communities, so that several rival communities remained in the same colony causing violent confrontations between them. According to the above, the correct answer is D. Arbitrarily formed boundaries caused wars between rival tribes.
