Which of the following will be most effective in improving group effectiveness?

A) Encouraging the practice of boss massaging
B) Incorporating autocratic leadership
C) Encouraging group think
D) Changing ineffective norms

Changing ineffective norms is the most effective way to improve group effectiveness. Norms are established patterns of behavior that guide the actions of group members. Ineffective norms can hinder productivity and lead to conflict, so changing them can help the group work together more effectively. Encouraging boss massaging and groupthink can lead to a lack of critical thinking and hinder the group's ability to make effective decisions. Autocratic leadership can be effective in some situations, but it can also lead to resentment and reduced morale among group members.