FSOT Pro

Answer: A - The assassination of Archduke Franz Ferdinand in June, 1914 was the tipping point for World War I. At the time, Franz Ferdinand was the heir presumptive to the Austro-Hungarian throne. His assassination in Sarajevo was the most direct cause of the first global war, although arms races and numerous shifts in the political structures of many European factions, as empires gave way to nations, contributed to the declaration of war.