Answer: C. to maintain the purity of the Aryan race.
Step-by-step explanation:
Forced sterilization during Nazism was part of a series of measures taken to purity "the Aryan race".
Nazi policy contemplated that there was "life unworthy of being lived" and that it was necessary to avoid that them having an inheritance, that is why different measures such as eugenics and sterilization were practiced.
People who were forcibly sterilized include people with mental illness, developmental illness, alcoholics, and even criminals.
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