Answer:
Step-by-step explanation:
The concerns that President Woodrow Wilson offered in his war message were inspired by **unrestricted submarine warfare by the Germans** . In his speech to Congress on April 2, 1917, Wilson expressed outrage at recent German submarine attacks and explained why the United States must not endure these attacks .
While Germany's invasion of Poland was a significant event that led to World War II, it did not inspire the concerns that Wilson offered in his war message. The Russian Revolution occurred in 1917, but it was not a direct cause of the United States' entry into World War I. Similarly, the potential alliance offered by Germany to Mexico did not directly inspire Wilson's concerns.
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