(A) ** the sinking of the Lusitania
(B) the attack on Pearl Harbor
(C) the explosion of the Maine
(D) the fall of Saigon
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: -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-3: -Germany’s resumption of submarine attacks on passenger and merchant ships in 1917 became the primary motivation behind Wilson’s decision to lead the United States into World War I.