One Reason That People Continued to Administer Electric Shocks in Milgram's

One reason that people continued to administer electric shocks in Milgram's study may be that the experiment starts with quite trivial shocks and, once the participant has committed themselves to giving shocks, it can be difficult for them to change their mind and not continue their commitment. This process:

A) reflects the psychology of 'sunk costs' which is similar to the foot-in-the-door technique of persuasion.
B) reflects the psychology of 'immediacy' which is similar to the foot-in-the-door technique of persuasion.
C) reflects the psychology of 'dehumanisation' which is similar to the door-in-the-face technique of persuasion.
D) reflects the psychology of 'obedience' which is similar to the door-in-the-face technique of persuasion.