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Based on my knowledge of World war its C. Basically Germany sent a message to Mexico saying to help them and they will help get Mexico's former land back to Mexico. (California, New Mexico, Texas, those states). It was deciphered thought but Britain found out the code it showed the U.S, which then joined the war
The excerpt from "The Enigma Machine” that supports the idea is C. After 1938, when the Germans introduced additional rotors and plugs to increase the number of possible combinations.
What is a central idea?
A central idea simply means the main idea in a literary work. It's the underlying message in the story.
Here, the excerpt from "The Enigma Machine” supports the idea that Allied forces expected the Germans to complicate their coding system is that after 1938, when the Germans introduced additional rotors and plugs to increase the number of possible combinations.
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