Answer: Rising Action
Explanation: It's describing what happens before the climax
"<span> Polish and British cryptologists had already developed alternative methods of recovering the daily keys. "
Just before it, the passage says "the Germans introduced additional rotors and plugs... increase the number of possible combinations".
As this was expected, so the Polish and British "<em>already</em> developed alternative methods"
hope this helps</span>
#3. To explain
Reason: it sounds right to me lol
