Final answer:
Group creativity is not a symptom of groupthink. Groupthink is characterized by conformity and a diminished range of perspectives due to the consensus-seeking nature of the group.
Step-by-step explanation:
The symptom that is not associated with groupthink is B. Group creativity. Groupthink refers to the phenomenon where members of a group modify their opinions to align with what they perceive to be the group consensus. Symptoms of groupthink often include a strong sense of group cohesion, consensus seeking, self-censorship by members to avoid conflict, and a sense of invulnerability within the group. On the contrary, group creativity involves generating a diverse range of ideas and perspectives, which is typically stifled in situations of groupthink due to the pressure to conform and reach a unanimous agreement.