Answer:
1. That Germany thought that they either had to destroy an American vessel or American lives at high seas.
2. They would be held accountable for such acts of naval authorities.
3. He would make sure that the American lives were safe and unharmed and that the property was unharmed
4. Because Germany threatened the US Army and the US citizen's lives.
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5. The American ships had been sunk without a warning.
6. A declaration of war.
7. Germany threatened the American citizen's lives and sunk our ships at sea.
8. That ships from the US nay had been shot down and sunk at sea.
9. April 2nd, 1917
Explanation:
