Respuesta :
Answer: The right answer is the B) Hall knew that growing outrage among the American public would help Britain’s cause.
Explanation: Just to elaborate a little on the answer, it can be added that this significant document proposed an alliance between Germany and Mexico during World War I, which Germany would "reward" by helping Mexico to recover New Mexico, Texas, and Arizona. The message was sent on January 16, 1917, and the British intelligence intercepted it and deciphered it, but the British foreign office did not present it to President Wilson until February 24, in a deliberate attempt to protect the intelligence service and to influence opinion in the United States against Germany, which, as Captain Hall rightly pointed out, was growing.