Answer: 1) adoption of Catholic Christianity and leaving behind pagan cults in early Middle Ages, 2) Renaissance and Reformation, 3)integration of ancient wisdom of Greece and Roman to philosophy, 4) persecution of Jews, expulsion of Arabs from Europe, Greeks coming to Europe (after the conquest of Constantinople in 1453), 5) discovery and colonization of the New World and other parts of the Globe, 6) so-called Modernity with its scientific revolution in the 17th centurry, 7) Enlightenment with its various (political and scientific) including constitutionalism, 8) romanticism with its significant consequences in arts, philosophy and medicine (psychology), 9) Darwinism and social darwinism in the context of industrial revolution, 10) secularization of European societies, 11) both World Wars, 12) Cold War, 13)decolonization, 14) post-1990 information revolution and globalization of everyday life.
Explanation: globalization of European society started already in the renaissance and continued later on as well. I am excluding Russia from this development because Russia started (just in a very limited way) participating in European development at the beginning of the 18th century.
The league of Nations, I believe.
Mainly because it toughened-up the Fugitive Slave Act, allowing official slave-catchers to hunt down runaways.
This recruited many new Abolitionists, and caused Harriet Beecher Stowe to write 'Uncle Tom's Cabin'.
During the Civil War, the South’s use of enslaved labor gave it a way to keep plantations running (Option "C" is the correct one).
Enslaved African Americans, who lived in the South of the US, responded to the American Civil War (1861–1865) in a variety of ways. Some slaves assisted the Confederate war effort, while others were forced to support the Confederacy by working on farms or plantations, in factories and households. There were many slaves who could escape and earn their freedom. Those slaves who remained on their plantations and farms worked as agricultural laborers while their production helped feed both civilians and soldiers. However, much of the wartime agricultural work in the South was carried out by female slaves, since males slaves were hired for the Confederacy's military and industrial works.