Answer :
The correct answer is B) Because the message was so important and needed to reach von Bernstorff, Zimmermann wanted the message to be carried across the ocean in a U-boat.
The statement that best explains how the evidence from this excerpt leads to the inference that the message Zimmermann sent was important is " Because the message was so important and needed to reach von Bernstorff, Zimmermann wanted the message to be carried across the ocean in a U-boat."
In the end, what happened was that on January 16, 1917, the British intelligence decoded a telegram from Zimmerman to the German ambassador in Mexico. When the British decoded the telegram, they sent it to the United States government and made it public. The United States, that had been maintaining a neutral position on the war, was very upset with the German government that also was showing hostility threatening to sink any ship that crossed European waters.