Sarah Chandler1.How did each of the following contribute to the creation of imperialism during the 19thcentury: Opium Wars? Leopold II? Congress of Berlin (1884)?2.What was the Monroe Doctrine? How did the United States use the Spanish American War as an opportunity to expand its influence in the world? 3.How was the European balance of poweraffected by the Crimean War (1854) and the Franco-Prussian War (1870)?