What factor changed woodrow wilson's opinion about entering world war i?

German U-boat activity had forced the United States into war.

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

The Germans violated the U.S. ultimatum against submarine attacks.

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i do not know if this question has options, but a main impact of the federal reserve act of 1913, which created the federal reserve bank, was the international use of the u.s. dollar, which soon became the world's leading currency - particularly during world war i, since many nations around the world asked the united states for money.