(A) a moral obligation to halt the refugee crisis in Belgium
(B) concern over the repayment of Allied debts to American banks
(C) a desire to become more involved in the affairs of Europe
(D) ** the outrage of American citizens over German submarine warfare
EXPLANATIONS BELOW
Concept note-1: -The British gave President Wilson the Zimmermann telegram on February 24, and on March 1 the American press reported on its existence. The American public was outraged by the news of the Zimmermann telegram and it, along with Germany’s resumption of submarine attacks, helped lead to the United States to join the war.
Concept note-2: -On April 2, President Wilson asked Congress to declare war against Germany specifically citing Germany’s renewed submarine policy as “a war against mankind. It is a war against all nations.” He also spoke about German spying inside the U.S. and the treachery of the Zimmermann Telegram.