Question

what factor changed woodrow wilsons opinion about entering world war i?

a. americans were angry german u - boats had killed u.s. citizens.

b. he believed that democracy in america was threatened.

c. he wanted to enforce the monroe doctrine.

d. he had promised to enter the war when he was reelected.

Explanation:

To determine the factor that changed Woodrow Wilson's opinion on entering World War I, we analyze each option:

• Option A: German U - boats (submarines) engaging in unrestricted submarine warfare, including sinking ships with U.S. citizens on board (like the Lusitania), angered Americans and was a key factor. Wilson initially wanted to stay neutral but the loss of U.S. lives due to German U - boat attacks shifted public and his opinion.
• Option B: There was no direct threat to American democracy from the war in a way that was the main factor for Wilson's change. The war was in Europe, and the threat to democracy argument was more of a later - stage justification for joining to "make the world safe for democracy".
• Option C: The Monroe Doctrine was about European interference in the Americas, and World War I was a European conflict, so this is not relevant.
• Option D: Wilson was re - elected with the slogan "He kept us out of war", so he did not promise to enter the war when re - elected.

Answer:

A. Americans were angry German U - boats had killed U.S. citizens.