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MITRE D3FEND is specifically designed to map defensive techniques to offensive adversary behaviors and tactics. In SOC and detection engineering, it provides a structured defensive ontology: you can identify an adversary technique (credential access, privilege escalation, defense evasion) and then select defensive countermeasures such as credential hardening, process isolation, monitoring/behavior analytics, and access control enforcement. The scenario describes a framework that “systematically maps defensive techniques to known adversarial tactics,” which aligns directly with D3FEND’s purpose. The other options are broader governance or maturity models rather than a defensive technique-mapping framework. Systems Security Engineering CMM and Cybersecurity Capability Maturity Models focus on process maturity and organizational capability development, not on mapping defensive controls to adversary behavior at a technique level. NIST CSF 2.0 is a high-level cybersecurity risk management framework organized around functions (govern, identify, protect, detect, respond, recover); it guides program structure but does not provide the same granular defensive technique taxonomy. Therefore, MITRE D3FEND is the correct choice for a structured, technique-to-defense mapping approach.