1. What effect did the Zimmerman note have on the United States’ position in the war?

A. It pushed the United States to join the war on the side of the Central Powers.
B. It made the United States suspend its trade embargo with Germany.
C. It was another reason for the United States to join the war on the side of the Allies.
D. It helped the United States decide to halt trade with Mexico.

C. It was another reason for the United States to join the war on the side of the Allies. The Zimmerman note, a secret message from Germany proposing a military alliance with Mexico against the United States, outraged the American public and increased support for joining the war on the side of the Allies. Eventually, the United States declared war on Germany in April 1917.