Which of the Following Were Criticisms of the Nuremburg Trials

Which of the following were criticisms of the Nuremburg Trials?

A) The crimes defendants were accused of were retroactive, that is, they were not clearly crimes at the time of their commission.
B) They were little more than vengeance by the victors of World War II
C) The laws, procedures, and judges were all selected by the allies, and the victorious allies, who had committed some horrifying acts of violence against civilians
D) All of the above