Groupthink Can Be Avoided by Doing All of the Following

Groupthink can be avoided by doing all of the following except

A) assigning the role of critical evaluator to each group member.
B) having the leader strongly advocate a particular course of action.
C) creating sub-teams to work on the same problem and then sharing their proposed solutions.
D) inviting outside experts to observe and react to group process and decisions.
E) assigning one member to play a "devil's advocate" role at each team meeting.