The correct option is Executive overview followed by the Security Plan then the System Assessment Report then the Plan of Actions and Milestones and finally the supplemental appendices.

This sequence is correct because the executive overview gives reviewers a concise summary up front and sets context for the rest of the package. The Security Plan then provides the detailed description of the system and control implementations so reviewers can understand how the system is designed and operated. The System Assessment Report follows to present evaluation results against those documented controls. The Plan of Actions and Milestones comes next to show how any findings will be remediated and tracked. The supplemental appendices are last because they contain supporting evidence and artifacts that back up the main documents.

Supporting appendices placed first followed by the main artifacts is incorrect because appendices are supporting materials and should not precede the overview and primary documents. Placing them first forces reviewers to search for context and a summary before seeing the main artifacts.

Security Plan then Plan of Actions and Milestones then executive overview then System Assessment Report is incorrect because the executive overview must appear at the beginning to provide context. Also the assessment report should follow the Security Plan so that findings relate directly to the documented controls.

System Assessment Report then Security Plan then executive overview then Plan of Actions and Milestones is incorrect because the assessment report should not be presented before the system documentation it assesses. The executive overview belongs at the start to orient reviewers and the POA&M should appear after the assessment to document remediation plans.

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