Which option is a decisive action element often used in disaster relief to support civil authorities?

• A. Retrograde
• B. Defense Support to Civil Authorities (DSCA)
• C. Tempo
• D. Attack

Answer: (B)

The key idea is how military resources are organized to assist civilian authorities during emergencies. Defense Support to Civil Authorities is a formal framework that enables the armed forces to provide domestically oriented help—like airlift, medical support, logistics, search and rescue, and other relief services—when local capabilities are overwhelmed and a governor or applicable authority requests assistance. This structure keeps military aid targeted, coordinated, and lawful, ensuring fast, integrated support that complements civilian response efforts.

That makes it the best fit for a decisive action element in disaster relief, because it is specifically designed for domestic civil support and outlines how military assets and capabilities are used to help civilians during emergencies.

The other terms don’t describe a program for domestic civil support: retrograde refers to pulling back or repositioning forces; tempo is about the speed or rhythm of operations; and attack is a combat action against an adversary.