13. Which did prompt European imperialism in the late nineteenth century? (Points : 3) zeal for missionary work A. discovery of gold in Africa B. abolition of slavery C. need for raw materials D. decline in worldwide trade 15. Which was an impact of European imperialism on the people of Africa? (Points : 3) greater self-rule loss of natural resources an end to tribal conflict expansion of slavery 6. Which source of evergy was introduced during the second Industrial revolution. solar power steam electricity coal