There Are Three Major Factors That Explain Groupthink Decision Making

There are three major factors that explain groupthink decision making. What is one of these factors?

A) Members are individuals whose unique backgrounds and perspectives are appreciated.
B) Reaching consensus is more important than any serious criticism of the decision.
C) Members of a group taking turns proposing options and providing for a give and take environment.
D) Members of a group have a cordial relationship with the leader and feel free to come up with unique solutions to the groups' problems.