Question

The __ caused the United States to enter World War I.

1.) revolution in Russia
2.) assassination of Archduke Ferdinand
3.) German attack on Belgium (not the answer I tried this)
4.) telegram and sinking of American ships

Answer 1

telegram and sinking of the American ships

Step-by-step explanation:

Germany started sinking US ships which angered the president. The Zimmerman note added to this. Arthur Zimmerman sent a telegram to Mexico which was intercepted by the British. It said if Mexico joined the war against the US then after victory they would return some of its territory back. That was the final push that led to the US to enter World War 1.