Final answer:
The Comprehensive Resilience Toolkit (CRT) provides a common operating platform to assess and forecast risk, as well as access to mitigation strategies and best practices.
Step-by-step explanation:
The answer to the question is a) Comprehensive Resilience Toolkit (CRT). The Comprehensive Resilience Toolkit is a platform that provides a common operating platform to assess and forecast risk, as well as access to mitigation strategies and best practices. It helps in implementing civil defense and emergency preparedness measures and ensures the resilience of critical national infrastructure.