Answer:
Systems
Explanation:
In the experiment, a group of subjects are divided into two groups (the prisoners and the guards)\
Before the experiment, the two groups are completely at peace and friendly with one another.
But because the system in the experiment made the guards group have overwhelming power toward the prisoners, the prison groups start to abuse that power and treat the prisoners badly. This indicates that the system which granted their power could drastically alter their behavior in a very short period of time.
