Answer: A. Coping Skills
Step-by-step explanation:
Coping skills can be define as the efforts to solve the personal and interpersonal problems. It helps in maintaining the stress and conflict within oneself. It is ability to regulate one's own emotional sense so as to take better decisions, make proper action and control one's own behavior in circumstances.
In this situation, the coping skills are the must required preventive strategies in the violent incident. These skills will help the person to stay calm and not affecting the other person.