Key Factors Leading to U.S. Entry into World War I

The United States' entry into World War I in 1917 marked a significant shift in its foreign policy and had lasting implications on both American and world history. Prior to entering the war, the U.S. government, under President Woodrow Wilson, faced mounting pressure from various sectors of society and international developments. In addition to economic interests, public sentiment was influenced by events such as unwarranted attacks on American citizens at sea, and growing frustrations with Germany’s unrestricted submarine warfare.

To analyze these factors accurately, which of the following developments directly contributed to the U.S. decision to abandon its neutral stance and enter World War I?