In RM severity, how do catastrophic and severe differ?

• A. Catastrophic is the most severe impact, often fatal or mission-ending; severe is very serious injuries or mission failure, but not as severe as catastrophic.
• B. Severe is the most severe impact, often fatal or mission-ending.
• C. Catastrophic is a minor disruption.
• D. Severe and catastrophic are identical concepts.

Answer: (A)