A troubled adolescent pulled out a gun in a school cafeteria, fatally shot three people, and injured many others. Hundreds of parents come to the school after hearing news reports. After police arrest the shooter, which action should occur next?

Choice A reason: Announcing campus security may reduce anxiety but does not address reunification. Acute stress elevates cortisol and amygdala activity, and without structured reunification, parents’ distress persists, as prefrontal cortex-mediated organization is needed for effective crisis management. Choice B reason: Designating zones for reunification organizes chaos, reducing amygdala-driven panic and cortisol surges in parents and students. This structured approach engages prefrontal cortex planning, ensuring safe, efficient reunification, addressing the immediate emotional and logistical needs post-crisis. Choice C reason: Metal detectors ensure safety but delay reunification, prolonging amygdala-driven anxiety and cortisol release. Parents searching independently may increase chaos, as lack of structured reunification hinders prefrontal cortex-mediated organization, making this less effective than zoning. Choice D reason: Blocking parents with tape escalates distress by preventing reunification, heightening amygdala activity and cortisol levels. This approach disregards emotional needs, impairing prefrontal cortex-mediated coping, and is counterproductive to resolving the crisis efficiently and compassionately.