Answer: The correct option is option D. PSYCHOLOGICAL REALISM
EXPLANATION: Psychological realism is a method used in literature, in which the story is focused on the characters attitude, interior motives, psychological processes, mindset, and mental narratives, instead of making the story simple and straight forward.
Because the video of Stanley Milgram focuses on the character attitudes and psychological state, which showed the participants laughing hysterically, chain-smoking, sweating, and fidgeting nervously, instead of making the story simply and straight forward. The video is an example of psychological realism. It tends to narrate the mental feelings of the participants, while under a particular action.