Use the primary source of the zimmerman telegram provided to answer this question.
it is indicated that germany wanted to keep this document a secret from other nations. what actions do you believe the u.s. would take in response to this telegram?

The United States response should honestly have been a full-out challenge of war, but another course of action could be an economic one. Supply aid to the allies, through weapons, ships, submarines, and money. Pretty much any action would be acceptable after receiving this.

it gave tribes greater control of their own affairs 

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