When a project team is consistently behind schedule and their work requires frequent corrections, it is essential to first evaluate the team's ability to perform the assigned tasks. This involves assessing whether the team members possess the necessary skills, knowledge, and resources to meet the project's requirements. By identifying any gaps in competencies or resources, the project manager can take appropriate actions such as providing additional training, reallocating tasks based on team members' strengths, or adjusting timelines to accommodate the team's capabilities. This approach aligns with the principles of project human resource management, which emphasize the development and management of the project team to enhance its performance and productivity123. References: (Project Management Institute. (2012). Increase project team effectiveness: step-by-step. Retrieved from PMI; Project Management Institute. (2007). Quality in project management-a practical look at chapter 8 of the PMBOKguide. Retrieved from PMI; Siles, R. (2023). How to Improve Team Performance. Retrieved from LinkedIn).

Implementing short cycles for inspection and providing feedback is aligned with the principles of servant leadership and agile project management. Servant leadership emphasizes flexibility, empathy, and empowering team members to adapt and thrive1. It involves facilitating the team's success by ensuring open communication and stakeholder engagement2. In the context of agile project management, short cycles or iterations allow for regular assessment of the project's progress and early detection of potential issues, which aligns with the PMBOK Guide's principle of engaging with stakeholders3. This approach allows the project manager to address the stakeholder's concerns by demonstrating progress and managing risks proactively.
:
"Need to Know: Servant Leadership" - Project Management Institute1
"Managing Stakeholders as a Servant Leader" - Project Insight2
PMBOK Guide principles3

When a major feature is requested by the project sponsor that significantly impacts the project's delivery date and budget, the project manager should communicate these impacts to the stakeholders. This involves presenting the results of the impact analysis and negotiating for the necessary resources and time to accommodate the new feature. This approach ensures that the stakeholders are fully informed of the implications and can make decisions based on the project's best interest. It aligns with the PMBOK guide's emphasis on stakeholder engagement and communication as key aspects of effective change management1.
:
PMBOK Guide's Change Management Process For PMP Exam1.
Managing Change in Organizations: A Practice Guide2.

The stakeholder register is a project document that identifies and classifies the project stakeholders, their roles, interests, expectations, and influence levels. It is an output of the Identify Stakeholders process, which is the first process in the Project Stakeholder Management knowledge area. The stakeholder register should be updated whenever there are changes in the project environment or stakeholder information, such as a promotion, a change of role, or a change of contact details. Updating the stakeholder register will help the project manager and the project team to communicate effectively and appropriately with the stakeholders, and to manage their expectations and engagement levels throughout the project life cycle.
The project management plan is a comprehensive document that describes how the project will be executed, monitored, and controlled. It integrates and consolidates the subsidiary plans and baselines from the different knowledge areas, such as scope, schedule, cost, quality, resources, communications, risk, procurement, and stakeholder management. The project management plan is an output of the Develop Project Management Plan process, which is the second process in the Project Integration Management knowledge area. The project management plan should be updated only when there are changes in the project scope, objectives, deliverables, or approach, and when these changes are approved through the Perform Integrated Change Control process. Updating the project management plan for a stakeholder promotion is not necessary, unless it affects the project scope or other aspects of the project.
The stakeholder engagement plan is a subsidiary plan of the project management plan that describes the strategies and actions to increase the support and minimize the resistance of the stakeholders throughout the project. It is an output of the Plan Stakeholder Engagement process, which is the second process in the Project Stakeholder Management knowledge area. The stakeholder engagement plan should be updated when there are changes in the stakeholder engagement levels, needs, or expectations, and when these changes are approved through the Perform Integrated Change Control process. Updating the stakeholder engagement plan for a stakeholder promotion may be required, depending on how it affects the stakeholder's interest, influence, or power over the project.
The communications management plan is a subsidiary plan of the project management plan that describes the communication methods, formats, frequency, and responsibilities for the project. It is an output of the Plan Communications Management process, which is the first process in the Project Communications Management knowledge area. The communications management plan should be updated when there are changes in the communication requirements, preferences, or channels of the project stakeholders, and when these changes are approved through the Perform Integrated Change Control process. Updating the communications management plan for a stakeholder promotion may be necessary, depending on how it affects the stakeholder' s communication needs or preferences.
Therefore, the correct answer is C. Stakeholder register, as it is the most relevant and appropriate document to update for a stakeholder promotion.
:
PMBOK Guide, 6th edition, pages 513-515, 520-521, 538-539, 563-564, 717-718.
PMP Exam Content Outline, June 2019, pages 6-7, 10-11, 14-15, 18-19.

The project manager should ask an experienced team member to coach the new team member, as this is a strategy for developing the skills and performance of the new team member. According to the PMI website, coaching is one of the interpersonal and team skills that a project manager should have. Coaching is a process of providing guidance, feedback, and support to help someone improve their abilities and achieve their goals.
By asking an experienced team member to coach the new team member, the project manager can leverage the knowledge and expertise of the existing team, and foster a culture of learning and collaboration. The project manager can also monitor the progress and results of the coaching, and provide recognition and rewards to both the coach and the coachee.
The other options, asking the new team member to follow the team ground rules, asking an experienced team member to identify a replacement, or asking the new team member to reassess their own capabilities, are not the best ways to deal with a new team member who is not making the expected progress on an assigned task.
Asking the new team member to follow the team ground rules may help the new team member to understand the expectations and norms of the team, but it does not address the specific issues or challenges that the new team member is facing. Asking an experienced team member to identify a replacement may be a drastic and demotivating measure, that may not be feasible or fair to the new team member. Asking the new team member to reassess their own capabilities may be a constructive feedback, but it does not provide any support or assistance to the new team member.
: 1 Interpersonal and Team Skills - Project Management Institute 2 A Guide to the Project Management Body of Knowledge (PMBOK Guide) - Sixth Edition, Chapter 9.4.2.4 3 Business Analysis for Practitioners: A Practice Guide, Chapter 5.3.3