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Hitler wrote a book while he was in prison. The correct answer is:
C. in prison
While serving time in prison after a failed coup attempt known as the Beer Hall Putsch in 1923, Hitler wrote his autobiographical manifesto titled "Mein Kampf" (My Struggle). In this book, he outlined his political ideology, anti-Semitic beliefs, and his plans for Germany's future. "Mein Kampf" became a central piece of Nazi propaganda and played a significant role in shaping Hitler's rise to power.
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