The correct answer is D. Euthanasia.
Step-by-step explanation
During the government of the Nazi party in Germany (1933 - 1945), a series of radical measures were established in all areas because this government was framed in the dictatorship; within its military action was the persecution against the Jews, the gypsies and other individuals that were considered as inferior and who were exiled, punished, judged and executed. These included people disabilities who were tried and on many occasions, euthanasia was applied to prevent their reproduction. These segregation practices were framed in eugenics which was a series of beliefs and practices that focus on human improvement through genetic intervention. So, the correct answer is D. Euthanasia.