Question

Which of these caused the united states to become involved in world war 1 ?

A.) the German invasion of Poland
B.) repeated violation of treaties by Japan
C.) enemy bombing of American military bases
D.) threats of American security made by Germany

Answer 1

The answer is D

Reason being that the sinking of ships by German U-boats, and a German attempt in the Zimmermann Note to get Mexico to declare war on the U.S. pushed the U.S. to getting involved.