Correct Answer: D
Following the stakeholder engagement plan is the best option for the project manager in this situation. The stakeholder engagement plan is a document that describes how the project manager will communicate with, manage the expectations of, and involve the stakeholders in the project decisions. By following this plan, the project manager can ensure that the decision about the new timeline is made in a transparent, collaborative, and timely manner, and that the stakeholders are informed and satisfied with the outcome. References:
(Professional in Business Analysis Reference Materials source and documents)
* PMBOK Guide, Seventh Edition, Section 13.2.3, "Stakeholder Engagement Plan"
* Professional in Business Analysis (PMI-PBA) Guide, Section 5.3.2, "Stakeholder Engagement"