why was Hall concerned that the Germans would learn about the British reading their secret messages

Why was Hall concerned that the Germans would learn about the British reading their secret messages? ... 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. Read the excerpt from The Dark Game.

Explanation:

in the section of speech is not

. a function is a relation in which each input has only one output. in the relation , y is a function of x, because for each input x (1, 2, 3, or 0), there is only one output y. x is not a function of y, because the input y = 3 has multiple outputs: x = 1 and x = 2.