(A) U.S.S. Maine
(B) ** Lusitania
(C) U.S.S. Admiral
(D) the Titanic
EXPLANATIONS BELOW
Concept note-1: -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.
Concept note-2: -Kapitänleutnant Walter Schwieger was the thirty-year-old commander of the submarine U-20 that sank the Lusitania.
Concept note-3: -RMS Lusitania was torpedoed by a German U-boat on 7 May 1915. The luxury passenger liner was crossing the Atlantic from New York to Liverpool when the German submarine U-20 fired without warning.
Concept note-4: -On the afternoon of May 7, 1915, the British ocean liner Lusitania is torpedoed without warning by a German submarine off the south coast of Ireland. Within 20 minutes, the vessel sank into the Celtic Sea. Of 1, 959 passengers and crew, 1, 198 people were drowned, including 128 Americans.
Concept note-5: -Lusitania, British ocean liner, the sinking of which by a German U-boat on May 7, 1915, contributed indirectly to the entry of the United States into World War I.