In Milgram's research on obedience,what was the teacher's perception of what would happen when the learner made a mistake

A)  The experiment would have to be terminated. 
B)  The learner would receive a shock. 
C)  The learner would be negatively reinforced. 
D)  The teacher would be asked to change places with the learner.

In Milgram's research on obedience, the teacher believed that when the learner made a mistake, they would receive a shock. The teacher was instructed to administer increasingly strong shocks to the learner every time they made a mistake on a memory test, with the shocks purportedly causing increasing levels of pain and distress. Despite the learner's pleas for the experiment to stop and the increasing severity of the shocks, many teachers continued to administer them when instructed to do so by the researcher.