Answer:
C.it tried to convince the Mexicans to declare War on the United States if the Americans entered
WWI
Explanation:
The Zimmermann Telegram was a secret diplomatic communication issued from the German Foreign Office in January 1917 that proposed a military alliance between Germany and Mexico.
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.
Zimmermann Telegram published in United States.
In the telegram, intercepted and deciphered by British intelligence in January 1917, Zimmermann instructed the ambassador, Count Johann von Bernstorff, to offer significant financial aid to Mexico if it agreed to enter any future U.S-German conflict as a German ally.