The leader of a work group has proposed a solution to a problem. Some group members believe that the solution will lead to negative results. However, instead of discussing their concerns, they decide not to challenge the leader's authority. The result is an unwise decision. In this case, the group has experienced __________. 1)the iron law of oligarchy 2)a self-fulfilling prophecy 3)collective unconsciousness 4)groupthink__________ is most appropriate when a group is dealing with emotional issues and high morale is needed. 1)Functional leadership 2)Instrumental leadership 3)Expressive leadership 4)Relational leadership