Which measure best maintains accessible egress routes during an explosion?

• A. Maintain dedicated corridors, remove obstacles, and implement rapid-response barriers or closing doors if needed.
• B. Close all doors and lock them to prevent access during the blast.
• C. Redirect everyone through a single, always-open route regardless of debris.
• D. Install clearly marked egress pathways with rapid-response barriers to clear paths quickly.

Answer: (D)