I think is D I'm not sure
Answer:
The Nazis began experimenting with poison gas for the purpose of mass murder in late 1939 with the killing of patients with mental and physical disabilities in the Euthanasia Program.
The technology rail roads had made transportation a lot more easier as it was able to provide easy access of transportation among the people, the free enterprise system is where the government laid rules of which are only few and are restricted for the contribution of those who are participating and for the sake of balance among the market in which had made a rise in the national markets because of this system and the population were a part of it as every development and achievement were because of the people involved.
B. I remember doing this and this made me type 20 letters