One of the contributing factors to America's initial decision to enter into World War I was the Zimmermann Note. What were the contents of this telegram sent from Germany?
A.
Germany's proposal that upon an alliance with Mexico, it would ensure the return of Mexican land lost to the United States.
B.
Germany's threat that upon a Mexican-American alliance, it would no longer engage in trade activities with Mexico.
C.
Germany's insistence that the Mexican government refuse to assist the Allies with financial or military aid.
D.
Germany's war secrets promised to the Mexican government after the United States entered the war.