(A) invasion by the British.
(B) ** sinking of the Lusitania.
(C) bombing of America’s land.
(D) attack at the U.S. Navy base.
EXPLANATIONS BELOW
Concept note-1: -On May 7, 1915, the Germans sunk the British ocean liner RMS Lusitania, which had over a hundred Americans on board. Wilson warned that the United States would not permit unrestricted submarine warfare or any further violations of international law.
Concept note-2: -The sinking of the Lusitania was the most notorious and deadly of several German submarine attacks in early 1917–attacks that were a key factor in the United States’ decision to abandon a policy of neutrality and enter the war.
Concept note-3: -Wilson cited Germany’s violation of its pledge to suspend unrestricted submarine warfare in the North Atlantic and the Mediterranean, as well as its attempts to entice Mexico into an alliance against the United States, as his reasons for declaring war.
Concept note-4: -America Declares War on Germany On April 2, 1917, Wilson went before a special joint session of Congress and asked for a declaration of war against Germany, stating: “The world must be made safe for democracy.”