The Phase 4 of DITSCAP C&A is known as Post Accreditation. This phase starts after the system has been accredited in Phase 3. What are the process activities of this phase Each correct answer represents a complete solution. Choose all that apply. 

Answer options:

A. Security operations
B. Continue to review and refine the SSAA
C. Change management
D. Compliance validation
E. System operations
F. Maintenance of the SSAA

EAFCD