Answer:
(c) Groupthink
Explanation:
Groupthink: The term is given by Irving Janis in 1972, which is commonly used in psychology. This is a psychological phenomenon, in which the people of a group shows the desire of conformity or harmony, and leads to dysfunctional or an irrational decision-making consequence.
Irving Janis has given eight symptoms of groupthink, and they are:
1. Stereotypes.
2. Self-censorship.
3. Morality.
4. Rationale.
5. Invulnerability.
6. Mind Guards.
7. Illusion of Unanimity.
8. Pressure.