World War one started on the 28th of July 1914 between two sides; The war started mainly because of four aspects: Militarism, Alliances, Imperialism and Nationalism. The overall cause of World War was the assassination of Archduke. As you can see Nationalism had made a big dent in Countries
Most slaves lived on plantations, but the plantations were not very big: they rarely had more than 100 slaves. The best answer is then A. lived on plantations with 20 or more slaves.
