The event that was widely acknowledged to have sparked the outbreak of World War I occurred on June 28, 1914, when Archduke Franz Ferdinand, heir to the Austro-Hungarian Empire, was shot<span> to </span>death<span> with his wife by the Bosnian Serb nationalist Gavrilo Princip in Sarajevo.</span>
Explanation:
Since slave trade became high in demand (due to its immense profitability), more African Americans were taken from their homelands to be enslaved and transported to the United States. It wasn't long before owning slaves became an integrated part of society, just as owning a phone is nowadays. No one even considered the concept of "all men are equal" in the context of slaves, let alone thought of them as any more than property. As a result, the morality of free people subsided as they exploited slaves for their own financial benefit.
C, Charles de Gaulle was not part of the big three. Poor fella kinda got left out lol. Hope this helps :)