History tells us that the assassination of Archduke Franz Ferdinand at the Saravejo on June 28, 1914 was what started the World War I (WWI), which lasted until 1918.
However, some historians argued that his death is just one of the contributing factors that led to the war. They said that even before the World War broke out, there was already brewing tension throughout Europe, involving alliances of European powers --- the Ottoman Empire, Russia and other parties that had existed for years, and the instability in the Balkans that threatened to destroy the existing agreements.
It was only the assassination of Franz Ferdinand that set off a rapidly escalating chain of events starting off with Austria-Hungary preparation to war. In a span of one week, Russia, Belgium, France, Great Britain and Serbia had lined up against Austria-Hungary and Germany, that begins the First World War.
During the outbreak of the war in 1914, the US remained on the sidelines of the war. Until in 1915, the Germany declared the waters surrounding the British Isle to be a war zone and sunk several commercial and passenger vessels that include US ships. In February 1917, the US Congress passed a $250 million arms appropriations bull intended to make the US ready for war against the Germany.
WWI contributed to the fall of Germany, Austria-Hungary, Russia and Turkey.
On the other hand, the Second World War (WII) originated from the formation of the alliance in 1936 which is also known as the Axis Power. It began with the signing of Friendship Treaty between Rome-German Axis on October 15, 1936. It was followed by the signing of the Anti-Comintern Pact between Japan and Germany on November 25, 1936, then by an even stronger alliance between Germany and Italy known as the Pact of Steel which was signed on May 22, 1939.
The Axis Powers were ruled by the following dictators: Adolf Hitler in Germany; Benito Mussolini in Italy; and Emperor Hirohito in Japan. They fought against Allied Powers, which started the WWII.
(The answer for the question is A).
