Answer:
4. Lusitania
Explanation:
The Sinking of the Passenger Liner Lusitania, which carried 128 American passengers, angered President Wilson, for Germany broke their promise of not sinking any ships with Americans in it. However, the Germans, in saying that the ship was carrying military equipment (which makes it a plausible target), was technically a war ship, and can be sinked, without breaking any maritime laws.
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