(A) The bombing of Pearl Harbor
(B) The assassination of archduke Fran’s Ferdinand
(C) ** The sinking of the British ocean liner Lusitania
EXPLANATIONS BELOW
Concept note-1: -The sinking of Lusitania didn’t directly cause the United States to enter the war. It did, however, fuel virulent anti-German sentiment in Britain and the United States and hinder diplomatic relations between Germany and the United States.
Concept note-2: -The Lusitania was carrying a cargo of rifle ammunition and shells (together about 173 tons), and the Germans, who had circulated warnings that the ship would be sunk, felt themselves fully justified in attacking a vessel that was furthering the war aims of their enemy.
Concept note-3: -On May 7, 1915, the German submarine (U-boat) U-20 torpedoed and sank the Lusitania, a swift-moving British cruise liner traveling from New York to Liverpool, England. Of the 1, 959 men, women, and children on board, 1, 195 perished, including 123 Americans.
Concept note-4: -The RMS Lusitania was a UK-registered ocean liner that was torpedoed by an Imperial German Navy U-boat during the First World War on 7 May 1915, about 11 nautical miles (20 kilometres) off the Old Head of Kinsale, Ireland.