Group Fitness Instructors Must Be Aware of Individual Participants' Negative

Group fitness instructors must be aware of individual participants' negative behaviors that can undermine group cohesion. If not dealt with immediately, such participants can monopolize class time or take the group in a negative direction. Which is the LEAST effective method to deal with this type of person?

A) Listen attentively to the person's concerns or complaints
B) Acknowledge understanding of his or her complaint
C) State that he or she will no longer be permitted to participate
D) Agree on a solution to address the complaint