During World War I, the Zimmermann Telegram was intercepted by the United States and found to contain what suggestion, to be undertaken if the United States entered the war?
A.
If the United States entered the war, Germany would target US coaling stations in the South Pacific.
B.
If the United States entered the war, Germany would enter into a military alliance with Mexico.
C.
If the United States entered the war, the US ambassador to Germany would be arrested immediately.
D.
If the United States entered the war, German U-Boats would target and destroy US naval bases in the United Kingdom.