Archduke Franz Ferdinand was assassinated, along with his wife in Bosnia by a Serbian anarchist. The alliance system pulled in other countries that didn't need to be in the argument between Bosnia and Serbia and kind of started World War l.
Ide have to say the second choice is the bests choice
The Great Depression was the worsteconomic crisis in U.S. history. From 1931 to 1940 unemployment was always in double digits. ... Those war jobs seemingly took care of the 17 million unemployed in 1939. Most historians have therefore cited the massive spending during wartime as the event that ended the Great Depression
African(sorry if I’m wrong)