Answer:
C) Ineffective communication because it involved aggression.
Step-by-step explanation:
The man was "sitting silently in a chair" when security arrived, therefore the situation had already settled down. "They grab the man and begin to yell at him for being disruptive" shows ineffective communication and behavior. If the patient was being disruptive by yelling, how is yelling at him an effective way to solve the situation, especially after he already calmed down? At that point, the security was being more disruptive than that one man.
Hope this helps! :)