Question

during his reelection campaign in 1916, president woodrow wilson used the slogan, “he kept us out of war.” in april of 1917, wilson asked congress to declare war on germany. what helped bring about this change?

bolshevik forces increased their strength in germany and italy.
britain was invaded by nations of the central powers.
russia signed a treaty of alliance with the central powers.
germany resumed unrestricted submarine warfare.

Explanation:

Wilson's shift from neutrality to seeking war with Germany was driven by Germany restarting unrestricted submarine warfare in 1917, which targeted U.S. merchant ships and violated American neutrality. The other options are incorrect: Bolsheviks took power in Russia, not Germany/Italy; Britain was not invaded by Central Powers; Russia exited the war via the Treaty of Brest-Litovsk after the U.S. declared war.

Answer:

D. Germany resumed unrestricted submarine warfare.