21. The following explains the MITRE ATT\&CK Enterprise Categories except? A. Adversarial Tactics, Techniques, and Common Knowledge (ATT\&CK Th ) for Enterprise is an adversary model and framework for describing the actions an adversary may take to compromise and operate within an enterprise network. B. The model can be used to better characterize and describe post-compromise adversary behaviour. C. The kill chain model does not explain how cybercriminals exploit a system from the cyber attack life cycle D. It both expands the knowledge of network defenders and assists in prioritizing network defence by detailing the tactics, techniques, and procedures (TTs)