To resolve the conflict, the project manager should communicate with the former supervisor now serving as a resource to clarify the roles and responsibilities within the new project. This approach aligns with conflict resolution strategies that emphasize clear communication and role definition to prevent misunderstandings and ensure that each team member understands their place and function in the project. It is essential for maintaining harmony and focus within the team, especially during transitions12.
References:
* PMBOKGuide, which provides guidelines on team roles and conflict management1.
* The PMI Guide to Business Analysis, which includes standards for stakeholder engagement and communication2.

This is the best answer because it involves engaging the relevant stakeholders in a constructive dialogue about the importance and benefits of following the project management procedures. According to the PMBOK Guide, project management procedures are part of the organizational process assets that help the project manager and the team to perform their work effectively and efficiently. By initiating a review of the procedures, the project manager can identify the gaps, issues, and opportunities for improvement, as well as communicate the value and rationale of the procedures to the CTO and the team. This can also help to build trust, collaboration, and commitment among the project participants. References: PMBOK Guide, 6th edition, pages 38-39, 541-542.

A hybrid approach combines predictive and adaptive elements to deliver projects. In a hybrid approach, the project manager can break down the requirements into smaller and manageable chunks, and prioritize them based on their value and risk. This way, the project manager can deliver the most important and uncertain requirements first, and get feedback from the stakeholders and customers. This feedback can help clarify the unclear requirements and improve the quality of the project deliverables. The project manager can also adjust the delivery plan based on the changing requirements and environment. A hybrid approach is suitable for projects that have some degree of uncertainty and complexity, and that need to respond to changing customer needs and expectations. References:
A Guide to the Project Management Body of Knowledge (PMBOK Guide) - Seventh Edition, Chapter 2:
Value Delivery System, Section 2.3: Delivery Approaches, pp. 31-35
Project Management Professional (PMP) Handbook, Section 2.2: PMP Exam Content Outline, Domain II:
Process, Task 1: Plan and manage project scope, pp. 14-15
Hybrid Project Management: What It Is & How to Implement It, by Simplilearn, published on February 10,
2020

According to the PMBOK Guide, 7th edition, section 12.2.3, "The issue log is a project document used to capture and track issues until they are resolved. It typically contains a description of the issue, the owner, the priority, the status, the resolution, and any other relevant information." Therefore, the project manager should schedule a meeting with the concerned team member to review and update the issue log together, as this will help to document the issue, assign responsibility, monitor progress, and implement resolution. Asking the team member to follow the approved communications management plan to communicate their issue (option A) may not be sufficient or timely, as the issue may require immediate attention and action. Reviewing the risk register with the team member to find the proper response action for this issue (option C) may not be applicable or effective, as the issue may not be a risk that was identified and planned for in advance. Asking the team member to raise a change request to assess the issue in detail (option D) may not be necessary or appropriate, as the issue may not affect the project scope, schedule, cost, or quality, and may be resolved within the project team. References:
* PMBOK Guide, 7th edition, section 12.2.3
* PMI-PBA Exam Practice Test and Study Guide, 2nd edition, page 184, question 22