The option that BEST describes the events leading up to the United States' involvement in World War I is:
D American citizens wanted to stay neutral unless innocent Americans were killed.
Initially, the sentiment in the U.S. was largely isolationist, with many Americans preferring to avoid involvement in the conflict unless there was a direct threat to American lives or interests. Over time, events such as the sinking of the Lusitania and the interception of the Zimmerman Telegram shifted public opinion and political pressure towards engagement in the war.