Answer:
B) Freedom of the seas.
Explanation:
The death of 120 Americans on a British ship destroyed by Germans in 1915, along with the discovery of Germany´s plan to cooperate with Mexico for recapturing American territories made the U.S. enter World War I.
Several times the United States warned Germany to not attack their neutral naval ships which carried supplies to Britain. But on May of 1915, a German submarine torpedoed a ship causing the loss of 1,198 civilians, among them, there were 120 American citizens.
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