Which of the following actions should officers take during an Immediate Action/Rapid Deployment response to an active threat?

In an Immediate Action/Rapid Deployment response to an active threat, the priority is to neutralize the threat as quickly as possible to prevent further harm to potential victims. Establishing close contact with the intruders allows officers to engage directly and disrupt the attacker's plans, thereby reducing the likelihood of mass casualties.

This proactive approach contrasts with tactics such as establishing a perimeter, which can delay necessary intervention; waiting for back-up, which may allow the situation to escalate further; or activating the fire alarm, which does not directly address the active threat and may create confusion. Engaging quickly and decisively is critical in these high-stakes situations, as it can save lives and minimize the impact of the threat.