Which organization gained popularity in reaction the the film birth of a nation

The correct answer is:

The Ku Klux Klan.

The KKK is an American hate group that promotes extremist ultraconservative beliefs such as white supremacy, white nationalism, and anti-immigration. They historically employed terrorism against those who opposed them. The film The Birth of a Nation (1915) aided the refounding of the Ku Klux Klan and played a major part in them gaining public approval.

explanation:

hitler's  "rise" can be considered to have ended in march 1933, after the reichstag adopted the enabling act of 1933 in that month. president paul von hindenburg had already appointedhitler  as chancellor on 30 january 1933 after a series of parliamentary elections and associated backroom intrigues.

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