Groupthink Can Be Avoided by Doing All of the Following

Groupthink can be avoided by doing all of the following EXCEPT:

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