According to the PMBOK Guide, the project manager should identify the source of the disagreement among the project stakeholders as the first step to facilitate the approval of project requirements. This is because identifying the source of the disagreement can help the project manager understand the root cause of the conflict, the interests and needs of the stakeholders, and the potential impact of the disagreement on the project objectives and deliverables. By identifying the source of the disagreement, the project manager can then choose an appropriate conflict resolution technique, such as compromising, collaborating, smoothing, forcing, or withdrawing, to resolve the issue and obtain the approval of the project requirements1. The other options are not the first steps to facilitate the approval of project requirements, because:
* Reviewing the project charter may help the project manager clarify the project scope, objectives, and high-level requirements, but it does not address the specific source of the disagreement among the stakeholders2.
* Performing a stakeholder analysis may help the project manager identify the stakeholders, their roles, expectations, influence, and communication needs, but it does not address the specific source of the disagreement among the stakeholders3.
* Holding a team-building event may help the project manager improve the team morale, trust, and collaboration, but it does not address the specific source of the disagreement among the stakeholders4. References: 1: PMBOK Guide, Sixth Edition, Chapter 9.5.2.1, Conflict Management 2: PMBOK Guide, Sixth Edition, Chapter 4.1.3.1, Project Charter 3: PMBOK Guide, Sixth Edition, Chapter 13.1.3.1, Stakeholder Analysis 4: PMBOK Guide, Sixth Edition, Chapter
9.4.2.4, Team-Building Activities

When a project team lacks the necessary skills to execute, it is essential to address this gap to ensure the project's success. Adding a subject matter expert (SME) can provide the specialized knowledge and skills required to meet the project's objectives. This aligns with the PMBOK Guide's emphasis on acquiring the necessary team to achieve project objectives and the PMP's focus on the importance of human resources in project management. The SME can assist the team in understanding and performing the tasks correctly, thus contributing to the project's success within its hard timeline.
References: The answer is verified as per the PMP Examination Content Outline, which emphasizes the importance of project human resource management, including acquiring, developing, and managing the project team (1). The detailed explanation is supported by the PMI Guide to Business Analysis, which highlights the importance of ensuring that the project team has the appropriate competencies and skills to perform the work (6).

The described behavior-agreeing externally while internally opposing-matches the accommodative (also known as smoothing or yielding) conflict resolution style. This approach involves one party giving in to maintain harmony, even at the cost of their own interests.
According to the PMI's conflict resolution techniques:
Accommodating (or smoothing): One party gives in to maintain harmony.
Avoiding: Withdrawing from conflict and not addressing it.
Collaborating: Working together to find a win-win solution.
Competing (Combative): Pursuing one's own concerns at the other's expense.
The team members in the scenario were not withdrawing (so not Avoidant), and certainly not arguing (so not Combative). They weren't actively resolving either, which rules out Collaborative. Thus, the correct resolution style is Accommodative.
References:
PMBOK Guide - Sixth Edition, Section 9.5.2.1 (Interpersonal and Team Skills: Conflict Management) PMI Talent Triangle: Leadership - Conflict Resolution Techniques
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According to the Project Management Professional (PMP) principles, when transitioning from a predictive to an iterative approach, it's crucial to maintain clear and transparent communication about project requirements and changes. This is often achieved through the use of product and sprint backlogs, which should be well- documented and visible to all team members. If the team is unsure of what needs to be done due to changes requested by the product owner, it indicates that the backlogs may not be adequately maintained or visible to the team. Therefore, the project manager should ensure that these backlogs are properly documented and accessible to the team. References: Project Management Professional (PMP) Certification Handbook, PMBOK Guide (6th Edition), Chapter 3: Project Management Processes for a Project, Section 3.8 Closing Process Group. Professional in Business Analysis (PMI-PBA) Handbook, Chapter 2: Needs Assessment.

The project manager should analyze the team members' influence levels and schedule a training on the importance of daily standups and the time-bound feature of the meetings (Option A). This approach is based on the principle that understanding the influence levels of team members can help in effectively managing their participation in meetings1. Additionally, training on the importance of daily standups can help team members understand the value of these meetings and encourage their participation2.
Requiring all team members to attend the daily review meetings as they are requested by the project sponsor (Option B) may not be effective if the team members do not see the value in these meetings2. Informing the functional manager and replacing team members who cannot join the daily progress meetings (Option C) may not be practical or beneficial for the project2. Reviewing the influence of each team member, calling the team members with the highest influence to a meeting, and convincing them to join the daily standups (Option D) may not ensure the participation of all team members1.
References:1: 10 Project Meetings to Guide Your Project Management Team - ProjectManager.com2: 6 Techniques for Running Project Management Meetings - Fellow.app