(A) plant German spies in the United States.
(B) sink passenger ships without warning.
(C) make a truce with Russia.
(D) ** help Mexico regain U.S. territory.
EXPLANATIONS BELOW
Concept note-1: -The note revealed a plan to renew unrestricted submarine warfare and to form an alliance with Mexico and Japan if the United States declared war on Germany. The message was intercepted by the British and passed on to the United States; its publication caused outrage and contributed to the U.S. entry into World War I.
Concept note-2: -The obvious threats to the United States contained in the telegram inflamed American public opinion against Germany and helped convince Congress to declare war against Germany in 1917. Between 1914 and the spring of 1917, the European nations engaged in a conflict that became known as World War I.
Concept note-3: -In response to the breaking of the Sussex pledge, the United States severed diplomatic relations with Germany. Several weeks later, on February 24, the British presented the Zimmermann telegram to the U.S. Government in an effort to capitalize on growing anti-German sentiment in the United States.
Concept note-4: -Zimmermann’s alliance proposal did reach the desk of Mexican President Carranza, but it was officially rejected once a military commission determined that there would be no benefit in accepting it.
Concept note-5: -The telegram said that if Germany went to war with the United States, Germany promised to help Mexico recover the territory it had lost during the 1840s, including Texas, New Mexico, California, and Arizona.