Which excerpt from "the enigma machine” supports the idea that allied forces expected the germans to complicate their coding system?

The excerpt from "The Enigma Machine” that supports the idea that Allied forces expected the Germans to complicate their coding system is the following: 

"The Germans knew their enemies were listening to their secret radio communications, but they were confident their messages were undecipherable.

The ENIGMA machine so enciphered the messages that the Germans assumed the contents could be deciphered only by duplicate ENIGMA's set according to precise and frequently changed settings."

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your answer is b. "with strong wording encouraging readers to take action."

chapter i -- paris: september, 1792

a surging, seething, murmuring crowd of beings that are human only in name, for to the eye and ear they seem naught but savage creatures, animated by vile passions and by the lust of vengeance and of hate.

during the greater part of the day the guillotine had been kept busy at its ghastly work: all that france had boasted of in the past centuries, of ancient names, and blue blood, had paid toll to her desire for liberty and for fraternity.

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