Answer:
a) The United States ended its neutrality during World War I
Step-by-step explanation:
initially, during the world war 1, the United States decided to stay neutral, as was typical policy for them however, after a series of events, including the sinking of the Lusitania and finally, the Zimmerman telegram, revealing Germany’s attempts to get Mexico on its side in the war, America ended its period of neutrality and entered world war 1