The project manager should have established ground rules for the team at the beginning of the project, which would include guidelines for communication, decision making, conflict resolution, and stakeholder engagement. Ground rules help the team to work effectively and collaboratively, and to avoid misunderstandings and disagreements. Providing copies of the stakeholder engagement plan (A) is not enough, as it does not specify how the team should interact with the stakeholders. Defining the roles and responsibilities of the team members (B) is also important, but it does not address the issue of who should attend the meeting with the local council authority. Updating the communications management plan is not relevant, as it does not prevent the conflict from occurring in the first place. References: PMBOK Guide, 7th edition, page 91; Agile Practice Guide, page 14.

The project manager should have assessed the organizational culture at the beginning of the project to understand the readiness and willingness of the functional groups to adopt agile approaches. Organizational culture is the set of shared values, beliefs, and norms that influence the way people think, feel, and behave in an organization. It affects the project management style, communication, stakeholder engagement, and change management. By assessing the organizational culture, the project manager can identify the potential barriers and enablers for agile transformation, and plan appropriate strategies to address them. For example, the project manager can provide training, coaching, mentoring, and feedback to the functional groups to help them understand and embrace the agile values and principles. Circulating the project charter (option A) is a good practice, but it does not ensure that the functional groups are prepared and supportive of the agile approaches. Determining the level of maturity of the employees (option C) is a useful input, but it does not capture the whole picture of the organizational culture. Communicating the project schedule (option D) is also important, but it does not address the underlying reasons for the pushback from the functional groups. References:
* PMBOK Guide, 6th edition, page 30-31, section 2.2.2 Organizational Culture
* [Agile Practice Guide], page 16-17, section 2.1.2 Organizational Culture
* PMP Exam Prep, 10th edition, page 435, question 435, answer and explanation

The project manager must take immediate action to address both behavioral and performance issues.
Providing direct, constructive feedback to the underperforming senior technical member will help address their critical behavior and performance lapses. According to the PMBOK Guide - Seventh Edition, project managers are responsible for managing interpersonal conflicts and promoting team collaboration.
By addressing the disruptive behavior and lack of task performance, the project manager fosters a psychologically safe environment and restores team dynamics.
Option A avoids the issue and reduces collaboration.
Option B escalates prematurely and may cause greater disruption.
Option C is positive, but without addressing the root cause, the issue may persist.
References:
PMBOK Guide - Seventh Edition, Team Performance Domain
PMI Talent Triangle - Leadership: Conflict and Feedback Management
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The Project Management Professional (PMP) emphasizes the importance of not just collecting data but also analyzing and interpreting it to ensure that it is relevant, meaningful, and easily understood by stakeholders.
This approach helps to highlight key insights and findings, making the report more valuable and effective. It aligns with the PMBOK guide's principles of stakeholder engagement, which include understanding and analyzing stakeholder needs and managing their expectations through effective communication.
= PMBOK Guide and PMP Examination Content Outline123.