If the client has already approved a change through a formal project order amendment, the project manager must initiate re-planning with the new scope. This aligns with adaptive and traditional approaches where major scope changes require updates to planning documents.
Option A delays necessary rework.
Option C addresses risk mitigation, but re-planning must begin first.
Option D is unnecessary because the client has already accepted the amendment.
References:
PMBOK Guide - Seventh Edition, Planning and Delivery Performance Domains PMI Change Management Guidelines

Adding an experienced professional to the agile project team is a strategic approach to bridge the knowledge gap while fostering an environment of learning and expertise development within the team. This aligns with the PMI's guidance on leveraging project team expertise to develop better project solutions, as it facilitates the acquisition and recognition of expertise on the project team and promotes effective sharing and use of information possessed by the experts1. It also resonates with the PMI-PBA's emphasis on enhancing team effectiveness through knowledge sharing and continuous improvement in team capabilities2. References:
* Leveraging Project Team Expertise for Better Project Solutions | PMI1
* Increase Project Team Effectiveness - Step-by-Step | PMI2

To ensure that the project acceptance criteria are met for all project deliverables, the project manager should include the expectations and needs of project stakeholders in the creation of the project acceptance criteria.
This aligns with the best practices in project management, which emphasize the importance of understanding and incorporating stakeholder requirements to achieve project success. By doing so, the project manager can ensure that the deliverables will meet the agreed-upon standards and satisfy stakeholder needs, which is crucial for the acceptance of the project outcomes.
Project Management Institute. (2024). A Guide to the Project Management Body of Knowledge (PMBOK Guide) - Seventh Edition.
Project Management Institute. (2024). Project Management Professional (PMP)Certification Handbook.
KnowledgeHut. (2024). Project Management Acceptance Criteria with Examples.
ProjectManagers.Org. (2024). Project Acceptance Criteria * The Definitive Guide.

The symptoms point to misaligned stakeholder engagement: some stakeholders are under-engaged, while another is over-involved in low-value interactions. The project manager should first review and update the stakeholder engagement plan (C) to recalibrate who needs what level of involvement, through which channels, and for which decisions. Updating the plan ensures engagement is intentional and tailored- defining communications frequency, meeting invitations, decision roles, and information needs based on stakeholder influence and interest. Regular communication (A) is good practice, but without adjusting the engagement strategy it can perpetuate irrelevant meetings and still fail to engage the right people. Ishikawa root cause analysis (B) is more appropriate for technical or process defect analysis and is not the first response to an engagement misfit. Removing stakeholders from meetings (D) may be part of the updated plan, but doing it immediately without aligning expectations and decision rights can create gaps in governance and dissatisfaction. A refreshed engagement plan improves collaboration efficiency, reduces meeting waste, and increases the likelihood that key stakeholders participate at the right times.

In a hybrid project management approach, the project manager often needs to adjust their role to become more of a servant leader. This involves supporting team collaboration and removing any impediments that may hinder the team's progress. The hybrid approach combines the predictive (or waterfall) and agile methodologies. High-level project phases are planned using the waterfall approach, and the actual task execution is done in an Agile way1. Therefore, the project manager's role in a hybrid environment is to facilitate this process, ensuring that the team can effectively carry out their tasks1. References: 1