Answer: Justify their actions externally
Step-by-step explanation:
External justification is defined as the mechanism in which justification from external factors are searched for cognitive dissonance. External factors and events are made the cause of behavior that took place and the person himself/herself is not responsible for behavior.
According to the question. external justification is descried by people who follow authorities for their behavior.Execution team are basing their action or behavior on external factors i.e.- orders for avoiding their personal responsibility from executions