According to the CMMC Assessment Process (CAP) and the C3PAO Authorization Requirements, every assessment conducted by a Certified Third-Party Assessment Organization (C3PAO) must undergo a formal Quality Management System (QMS) review before the results are finalized and uploaded to the eMASS (Enterprise Mission Assurance Support Service) or the SPRS (Supplier Performance Risk System).
The Quality Review Requirement: The CAP explicitly states that the C3PAO is responsible for the accuracy and integrity of the assessment findings. Before the Assessment Team Lead can formally submit the package, a person or team within the C3PAO (who was ideally not part of the active assessment team to ensure objectivity) must conduct an internal review. This review ensures that the evidence collected supports the "Met" or "Not Met" determinations and that all CMMC methodology requirements were followed.
Why other options are incorrect:
Option A: While there may be administrative costs associated with maintaining C3PAO status, paying a specific "per-submission fee" is not a mandatory procedural stepwithin the assessment lifecyclethat governs the validity of the results.
Option C: The Cyber AB (CMMC-AB) provides the platform and oversight, but a "forthcoming notification" is not a formal requirement in the CAP; the act of submission itself serves as the notification.
Option D: While a final briefing is a "best practice" and usually occurs during the "Post-Assessment" phase, the internal quality review (Option B) is the regulatory mandate that must be completed to ensure the C3PAO's certification of the results is valid and defensible.
Reference Documents:
CMMC Assessment Process (CAP) v1.0: Section on "Phase 4: Reporting Results," specifically the sub-section on C3PAO Quality Assurance Review.
C3PAO Quality Management System (QMS) Requirements: Outlines the necessity for internal validation of assessment packages to maintain accreditation.