Answer:
A. The Nuremberg trials
The massive loss of life during World War 2 led to the establishment of the Nuremberg trials, which were a series of military tribunals held by the Allied powers after the war to prosecute prominent leaders of Nazi Germany for war crimes, crimes against peace, and crimes against humanity. The trials were held in Nuremberg, Germany, between 1945 and 1949, and resulted in the conviction of several high-ranking Nazi officials. The trials were a direct response to the atrocities committed during the war and were intended to hold the perpetrators accountable for their actions.