(A) 1912
(B) 1915
(C) 1918
(D) ** 1914
EXPLANATIONS BELOW
Concept note-1: -World War I began after the assassination of Austrian archduke Franz Ferdinand by South Slav nationalist Gavrilo Princip on June 28, 1914. Read more about why the Balkans became the “powder keg of Europe.”
Concept note-2: -July 28, 1914 Austria-Hungary declares war on Serbia, beginning World War I.
Concept note-3: -First World War (World War I) is considered as one of the largest wars in history. The world’s great powers assembled in two opposing alliances: the Allies (British Empire, France and the Russian Empire) versus the Central Powers (Germany and Austria-Hungary). WWI lasted from 28 July 1914 to 11 November 1918.
Concept note-4: -The spark that set off World War I came on June 28, 1914, when a young Serbian patriot shot and killed Archduke Franz Ferdinand, the heir to the Austro-Hungarian Empire (Austria), in the city of Sarajevo. The assassin was a supporter of the Kingdom of Serbia, and within a month the Austrian army invaded Serbia.