3. deliver electric shocks to a learner for giving incorrect answers.
Explanation:
Stanley Milgram was a famous psychologist who has experimented on obedience to authority figures. He almost conduct a series of experiments at Yale University.
In Milgram's study, the participants who were involved or the part of the study were led to trust or believe that they were conducting or assisting an unconnected experiment in which the participants had to do electric shock to a specific learner.
Milgram's series of obedience experiments are therefore considered as important because they give a reference frame for real-life examples of destructive and extreme obedience.
In order to have reduced the impact of 1918 Spanish flu was to social distance and reduce people out in the open and no large gathers instead of having a parade during the peak of the Spanish flu.
