The correct answer is C . Under the official CMMC Assessment Process, the C3PAO is responsible for submitting CMMC Level 2 certification assessment results into CMMC eMASS , which is the Enterprise Mission Assurance Support Service environment used for CMMC assessment result submission. The CMMC Assessment Process Version 2.0 states that CMMC Level 2 certification assessment results are uploaded to CMMC eMASS by the C3PAO, and that the user workspace used for upload must exist within the scope of the C3PAO’s DIBCAC-assessed environment.

This means the OSC does not submit the final certification assessment package directly, and the Lead Assessor does not independently submit final results to the CMMC-AB. The Lead Assessor leads assessment execution, prepares findings, supports the out-brief, and works with the assessment team, but the formal assessment-result submission function belongs to the authorized C3PAO. The CMMC Quality Assurance Professional review occurs before final submission to help ensure assessment completeness, consistency, and quality. After that review, the C3PAO submits the assessment results into the official CMMC eMASS environment. Therefore, options A , B , and D are incorrect because they identify the wrong receiving entity or the wrong submitting party. Option C correctly identifies both the submitting organization and the official submission system.

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