Final answer:
The passage would be useful for researching motivations for European imperialism in Africa, specifically the exploitation of rubber in the Congo under King Leopold II. The situation described in the passage was influenced by the meeting of the Berlin Conference.
Step-by-step explanation:
The information in this passage would be most useful to an economist researching motivations for European imperialism in Africa. The passage describes how King Leopold II of Belgium focused on rubber as the main export of the Congo, which was in high demand due to the mass marketing of bicycles and automobiles in the 1890s. Leopold acquired a monopoly on rubber production by forcing out competition and exploiting cheap labor, resulting in high profits.
The event that contributed to the situation described in this passage is the meeting of the Berlin Conference. The conference, held in 1884-1885, marked the division of Africa among European powers and established the guidelines for colonization. It provided the opportunity for Leopold to claim the Congo as his personal possession and exploit its resources.