Answer: He said he was just following orders
Step-by-step explanation:
When Dr. Kaufmann asked how it was possible for Hoss to destroy the Jews and carry out the actions despite feeling pity for the victims, he stated that he had only one and decisive argument which was the strict order and the reason given for it by the Reichsführer Himmler.
Therefore, Rudolf Höss defended his actions to the court by saying that he was just following orders.
Therefore, the correct option is D.