Explanation
The benefits realization plan is the document that describes how and when the benefits of the project will be delivered, measured, and evaluated. It also identifies the benefits owner, who is responsible for ensuring that the benefits are realized. The project manager should review the benefits realization plan with the new stakeholder to address their concerns about the value of the deliverables and to align their expectations with the project objectives. The other options are not the best actions to take in this situation, as they do not directly address the stakeholder's concerns or provide them with the relevant information. References: = A Guide to the Project Management Body of Knowledge (PMBOK Guide) - Seventh Edition, Chapter 2: Value Delivery System, Section 2.4: Benefits Management, Page 41-42.