Studies of Group Interactions and Decision Making Support Which of the Following

Studies of group interactions and decision making support which of the following statements?

A) Pressuring groups to reach unanimous decisions is simply a waste of time and causes animosity among the group members.
B) Pressuring groups to reach unanimous decisions does not usually produce changes in opinion.
C) Groups would more carefully consider the evidence if they did not need to come to a unanimous decision.
D) Minority opinions cannot exert normative pressure, but often can change people's minds via informational pressure.