Answer: The officer should stay in the presence of the soldier until the order has been obeyed
Explanation: Stanley Milgram, a psychologist at Yale University carried out one of the most famous studies of obedience in psychology.He concluded that
ordinary people are likely to follow orders given by an authority figure, even to the extent of killing an innocent human being. Individuals tend to obey orders from other people if they recognize their authority as morally right and/or legally based.
Milgram also found that obedience levels were maintained if the person giving the order wore a type of uniform and the person themselves remained constant so to achieve obedience according to Milgram's study, the commanding officer should stay in the presence of the soldier.