B) modification of the opinions of members of a group to align with what they believe is the group consensus
Explanation:
Groupthink: In social psychology, the term groupthink was proposed by Irving Janis in 1972, and is defined as a psychological phenomenon that arises in a particular group of people that possesses the desire or need for conformity and harmony in the group members often leads to a dysfunctional or an irrational decision-making outcome.
Groupthink often results in the faulty decision-making process in a try to keep the group members intact.
