Answer:
At the 1942 Wannsee Conference, Reinhard Heydrich developed the plan to carry out the holocaust.
Step-by-step explanation:
On January 20, 1942, Reinhard Heydrich was elected maximum representative of the SS during the Wansee Conference. As the host of this meeting, Heydrich outlined to all those present, most of them members of the Nazi Party and sent from the different Ministries of the Reich, the plan about the Final Solution through which the Holocaust would be gestated to group, deport and exterminate by gas chambers to millions of Jews throughout Europe. In fact already the previous year, the "Blonde Beast" as defined his enemies to Heydrich, had been responsible in Ukraine for the murder of 35,000 people, mostly Jews, during the mass shootings of the Babi Yar Massacre.