Option D is correct. A board proposal must enable an investment decision using the business problem, measurable outcomes, principal risks, financial impacts and implementation implications. Detailed technical configuration belongs in supporting documents. When an existing estate is being grown or extended, the proposal should protect currently running workloads and account for remaining asset value. Use current metrics and realistic forecasts to justify the change and sequence deliverables to address the most pressing customer constraint. The other choices either substitute unverified assumptions for the customer’s actual evidence or solve a secondary issue rather than the controlling requirement. The architect should retain evidence for this decision in the requirements matrix, architectural assumptions, implementation plan and acceptance criteria. That discipline establishes a defensible link between the customer’s stated need and the capabilities delivered. Executive-facing solution proposals must connect recommendation, justification, expected benefits and delivery approach. Architectural assumptions and trade-offs should remain transparent, and the plan should show how the customer will accept each material milestone.

Study Guide Reference: HPE Edge-to-Cloud Fundamentals — Prepare a Proposal to Grow an Installed Solution or Expand to Other Solutions; Presenting an HPE Solution.