Which option lists the complete set of CBRN passive defense elements?

• A. Shape, Sense, Shield
• B. Shape, Sense, Shield, Sustain
• C. Shape, Shield, Sustain, Reconnaissance
• D. Shape, Sense, Sustain, Detect

Answer: (B)

The question tests understanding of the four elements that makeup CBRN passive defense. The complete set is Shape, Sense, Shield, Sustain.

Shape refers to reducing vulnerability through planning, design, and infrastructure choices that make it harder for a CBRN event to cause harm. Sense covers detection and warning—systems that monitor for CBRN threats and provide timely alerts. Shield involves protecting people and assets with protective gear, barriers, and decontamination capabilities. Sustain focuses on maintaining operations and enabling recovery—logistics, medical support, decontamination, and long-term resilience after an incident.

Only the list that includes all four components—Shape, Sense, Shield, Sustain—covers the full scope of passive defense. The other options omit Sustain or replace Shield or Sense with terms that don’t fully fit passive defense roles, so they don’t represent the complete set.