Which are the CBRN passive defense operational elements?

• A. Shape, Sense, Shield, Sustain.
• B. Detect, Delay, Deflect, Deter.
• C. Shape, Shield, Survive, Secure.
• D. Observe, Notify, Notify, Respond.

Answer: (A)

The main idea here is that effective CBRN passive defense rests on four broad actions that cover planning, sensing, protection, and continuation of operations. Shape means shaping the operational environment and readiness so vulnerabilities are reduced before an incident happens. Sense covers detection and warning so you know what hazard you’re facing and when to act. Shield includes the protective measures that keep people and assets safe—things like protective equipment, shelters, and engineering controls. Sustain focuses on maintaining mission capability and life-support during a CBRN event, ensuring you can continue essential functions.

This combination—Shape, Sense, Shield, Sustain—gives a complete, protective posture: plan and configure the setting, detect and understand the threat, protect people and materials, and keep operations going. The other options mix terms that don’t align with this four-pillar framework, either emphasizing actions that aren’t the standard passive-defense elements or duplicating concepts rather than covering the full protective cycle.