How did the united states come to be involved in world war 1?

Explanation:

Why did the United States decide to enter the war and fight on the side of the Allies?

After attempts to keep the U.S. out of the war, Germany sent what is known as the Zimmermann note to Mexico stating that if America went to war, that Mexico would fight for Germany and would be granted the land they lost to America. The Americans got wind of the note and joined the Allies against Germany.

answer; i believe that the correct answer is (c) arctic tundra;