Most+Compelling+Reasons

I think that 1 and 3 are the most compelling reasons for war. 1 says that the United States entered the war because it was under attack despite its neutrality, and it is true because the German U-boats sank several British and American ships, creating many American casualties. Many Americans were furious after these incidents occurred, and were motivated to enter the war. 3 claims that the United States joined the war because Americans would have faced economic collapse if the Allies could not pay back all the loans made to them by American bankers. I thought this was really compelling because it's very realistic rather than ideal.