The United States entered the Great War (World War I) over 2 1/2 years after it started

The United States entered the Great War (World War I) over 2 1/2 years after it started. Why did the U.S. enter the war in the spring of 1917? Do you think these reasons were sufficient to go to war at that time? Do you think the U.S. could avoided entering the war and continued to be neutral during the duration of the conflict?

Write your response in complete sentences. It must be at least 250 words (though it can go longer). Be sure to answer all parts of the prompt.