Which of the following would have the impact shown in the accompanying graph? 
Definitions:
Collective Efficacy
Collective efficacy refers to the shared belief in a group's abilities to organize and execute the courses of action required to achieve given objectives.
False Consensus
A cognitive bias where people overestimate how much others agree with their own beliefs, behaviors, and attitudes.
Brainstorming
A group creativity technique designed to generate a large number of ideas for the solution to a problem in an uninhibited, non-judgmental environment.
Idea Generation
The process of creating, developing, and communicating new concepts or solutions.
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