In search of more efficient killing methods, the Nazis experimented with using the hydrogen cyanide-based fumigant Zyklon B at the Auschwitz concentration camp. This method was adopted for mass killings at the Auschwitz and Majdanek camps. Up to 6000 victims were gassed with Zyklon-B each day at Auschwitz.
Answer:
It had a massive impact on the workforce and economy of the United States. The Great Depression was still in play and the unemployment rate at that time was around 25% meaning recovering soldiers and people coming back couldn't do anything except hope for a good turn-around.
The time frame is slightly important. Though for the most part that is false. The Chinese leaders did not see the need to interact with outside societies as they had little reason to trade.
b. False