When faced with a key stakeholder who is refusing to participate and disagrees with the project team's approach, it is essential for the project manager to engage in proactive communication to resolve the disagreement. Scheduling a meeting as soon as possible allows for an open dialogue where concerns can be addressed, and a mutually agreeable approach can be developed. This aligns with the principles of stakeholder engagement and communication management as outlined in the PMBOK guide, which emphasizes the importance of involving stakeholders in decision-making processes and resolving issues through collaboration1.
References:
PMBOK Guide and Standards1
Project Management Academy article on handling unresponsive key project stakeholders1 ExamTopics discussion on similar PMP exam question2

Agile measurements, such as the delivery of incremental working products, can improve upon predictive measurements by providing tangible progress and value at regular intervals. This approach is particularly beneficial when the final stages of a project are delayed, as it ensures that the customer continues to receive functional components of the product. This method aligns with the agile principle of delivering working software frequently, from a couple of weeks to a couple of months, with a preference to the shorter timescale1.
References:
* 37 Agile Metrics - The Complete Guide for Agile Teams1
* Agile Practice Guide | Project Management Institute2
* Agile project management and the PMBOKguide3

According to the PMBOK Guide, scope change control is the process of managing the changes to the project scope and ensuring that they are aligned with the project objectives and benefits. Scope change control involves identifying, documenting, analyzing, approving, or rejecting changes to the project scope. Scope change control also requires updating the project management plan, project documents, and project baselines to reflect the approved changes. Scope change control is part of the integrated change control process, which involves coordinating changes across all aspects of the project, such as schedule, cost, quality, risk, and stakeholder expectations. The CCB is a formal group of stakeholders who are responsible for reviewing and approving change requests and ensuring that they are consistent with the project charter and business case.
The CCB also monitors the impact of changes on the project performance and benefits. The project manager should collaborate with the CCB to review the scope and submit any change requests that are necessary to keep the project on schedule while still meeting the project objectives. This will ensure that the scope changes are properly evaluated, authorized, and communicated to the project team and other stakeholders. The other options are not the best choices because they do not follow the scope change control process and may result in scope creep, rework, conflicts, or missed expectations. Option B is incomplete because it does not mention the collaboration with the CCB and the review of the scope. Option C is risky because it may increase the cost and complexity of the project without ensuring that the scope changes are justified and approved. Option D is irresponsible because it ignores the impact of scope changes on the project schedule and quality. References:
PMBOK Guide, Seventh Edition, Chapter 4: Project Integration Management, Section 4.6: Integrated Change Control PMBOK Guide, Seventh Edition, Chapter 5: Project Scope Management, Section 5.6: Scope Change Control PMI-PBA Guide, Chapter 5: Planning the Business Analysis Approach, Section 5.3: Benefits Tracking Scope change control - Project Management Institute

Some of the other options are not appropriate because:
A). Negotiate a reduced review attendance with the stakeholder and update the stakeholder engagement plan to reflect this reduced. This option may compromise the quality and effectiveness of the reviews, as the stakeholder may miss important information, feedback, or decisions. It may also create a perception of low priority or commitment from the stakeholder, which can affect the trust and relationship with the project team3. The stakeholder engagement plan should reflect the optimal level of engagement for each stakeholder, not the minimum4.
C). Record the issue in the issue log and escalate the conflict to the project sponsor for assistance. This option may be too drastic and premature, as the issue may not be a serious conflict that requires escalation. Escalation should be used as a last resort, when the project manager cannot resolve the issue by themselves or with the stakeholder5. Escalation may also damage the rapport and communication with the stakeholder, as it may imply that the project manager is unable to handle the situation or respect the stakeholder's perspective.
D). Explain to the stakeholder that the stakeholder engagement plan requires their attendance at all reviews.
This option may sound too rigid and authoritative, as it does not acknowledge the stakeholder's concern or provide any justification for the frequency of the reviews. It may also create a sense of resentment or resistance from the stakeholder, who may feel that they are being forced to comply with a plan that they do not agree with or understand. The stakeholder engagement plan should be a flexible and collaborative tool, not a rigid and imposed one4.
I hope this information helps you with your query. However, I suggest that you consult the official PMP and PBA reference materials and guides for more accurate and reliable information. Thank you for using Bing. # References:
1: Agile Manifesto Principles 2: Hybrid Project Management: What is it, Methodology & Software - Teamhood 3: Stakeholder Engagement: How to Keep Stakeholders Happy 4: Plan Stakeholder Engagement 5: Escalate Issues to Project Sponsor : [How to Escalate Project Issues Without Damaging Relationships] : [How to Deal with Difficult Stakeholders]

In an agile project, daily standup meetings are crucial for maintaining open communication among team members. These meetings serve as a platform for team members to report on their progress, discuss any challenges they are facing, and understand the work being done by their peers. When these meetings are not consistently attended, it can lead to a lack of understanding of each other's work, creating silos within the team. Regular attendance and active participation in daily standups are essential for fostering collaboration and ensuring that all team members are aligned and informed about the project's progress.
: = Agile communication best practices - PM-Training1.