During a final investment decision meeting, all of the stakeholders were aligned on the project...

When stakeholders are aligned and planning is complete, introducing aspirational targets should be handled thoughtfully. Rather than making commitments (which may jeopardize existing project constraints), the project manager should review the proposal and suggest optional or aspirational benefit improvements that do not compromise the approved budget, scope, or schedule.

According to the PMBOK® Guide – Seventh Edition, project managers are responsible for balancing competing constraints and ensuring realistic commitments. While enhancing benefits is desirable, it must be done transparently and optionally—not as a new baseline—unless formally approved.

Option A is risky; committing prematurely may create unrealistic expectations.

Option B is vague and lacks the structure of formally suggesting feasible opportunities.

Option D may seem defensive and close-minded.