The correct answer to this open question is the following.
Although there are no options attached we can say the following.
What should a leader do to dispel any notion or misperception that there are in-groups and out-groups in his or her work unit?
The leader has no very congruent with his decisions and actions. This is a must. People will closely observe the behavior of the leader to find real matches on what he says, promises acts, and delivers.
The leader has to establish a professional relationship with each group and every single member of the group. No preferences. No special concessions. The leader has to treat people with respect, correctly, and deliver on its promises. The members of the group should not notice any considerable difference in the way some groups are treated, compared to others.
The leader knows that evaluation in the workplace is by results not friendship.
The leader has to lead by example. It has to be a great communicator, a good listener. Have a set of skills and abilities to perform under pressure.
The leader has to make the toughest decisions. And of course, he has to hire the best individuals to form a true team.
