Answer:
D) American citizens wanted to stay neutral until innocent Americans were killed
Step-by-step explanation:
At the onset of WW I, Americans wanted to remain neutral and not to get involved in international affairs, however, such public opinion started to change when innocent Americans were killed by the Germany government.
One of the key events leading up to the United States' involvement in World War I was the sinking of Lusitania. Lusitania was a 32,000-ton ship carrying about 173 tons of war munitions for Britain that was hit by a torpedo sent by Germans on May 7, 1915. The event resulted in the death of more than 1000 people, including 128 Americans. The disaster did not immediately cause the US to enter the war but it strained diplomatic relations between the US and Germany and set off a chain of events that eventually led to the US entering the war on the side of the Allies On April 1917.