Which two symptoms of groupthink lead group members to overestimate their group's right and might?

Below are the symptoms of groupthink lead group members to overestimate their group’s right and might

1. The hallucination of insusceptibility.

2. Justification

3. Unchallenged faith in the gathering's profound quality.

4 stereotyped perspectives of the restriction.

5. Weight to accommodate.

6. Self-control of apprehensions.

7. The hallucination of unanimity.

8. Mind watches who shield the gathering from unpalatable information