When there are changes in the project requirements, such as changes in the government's cybersecurity requirements, it is important to manage these changes through a formal change control process1. This process usually involves documenting the change, estimating the effort required to implement the change, modifying the project schedule to include the change, and getting approval from the customer or project sponsor1. In this case, since the design changes can be made at no additional cost, the project manager should direct the team to request a change through the change control process to manage the new cybersecurity requirements1.
References: How to Manage Project Changes and Stay Ahead of the Curve

Before taking any action, the project manager should gather more context and engage the team to assess feasibility. This includes evaluating schedule impacts, resource constraints, regulatory implications, and whether scope trade-offs are required. This approach aligns with the PMBOK Guide's recommendation to evaluate change impacts before making decisions.
Option A is misaligned; root cause analysis is more appropriate for problem resolution, not for scope acceleration.
Option B assumes approval and feasibility without review.
Option C applies to Agile backlog reprioritization but this is a regulatory milestone, likely not in a product backlog.
References:
PMBOK Guide - Seventh Edition, Delivery and Planning Performance Domains PMBOK Guide - Sixth Edition, Section 4.6: Perform Integrated Change Control

The RACI matrix is a tool that clarifies the roles and responsibilities of individuals or groups in a project's successful completion. It helps to define who is Responsible, Accountable, Consulted, and Informed for each task or deliverable. This is particularly useful in addressing governance issues like the one described, where a team member is receiving conflicting assignments. By establishing a RACI matrix, the project manager can ensure that everyone knows who is responsible for what, thus preventing confusion and inefficiency.
References: (Project Management Professional (PMP) Reference Materials source and documents)
"RACI Matrix: Responsibility Assignment Matrix Guide for 2024" from project-management.com1.
"Project Governance Critical Success" from PMI2.
"Exam PMP topic 1 question 338 discussion" from ExamTopics3.
"PMP Exam Tip: The Responsibility Assignment Matrix (RAM)" from project-management-prepcast.com4.

In a virtual team, especially one that is globally distributed, it is crucial for the project manager to establish clear communication protocols and expectations. This includes defining roles and responsibilities, setting up a workable schedule considering different time zones, and respecting cultural observances. This approach ensures that all team members are on the same page and can collaborate effectively, thereby fostering team building. References: PMBOK Guide - Sixth Edition, Section 10.3.2.1: Plan Communications Management

The correct answer is C. According to the PMBOKGuide, project artifacts are any documents or deliverables that are produced as part of the project management processes1. These artifacts can include project plans, reports, baselines, metrics, lessons learned, and other outputs that show the performance and progress of the project and the project team. The project manager should gather these artifacts to provide evidence of the team member's high performance and contribution to the project success. This will help the project manager to make a strong case for the team member's promotion to senior management. Compiling key highlights from meeting minutes, asking the team member to write a biography, or calculating the health of the projects are not sufficient or relevant to demonstrate the team member's skills and competencies as a potential project manager. References: 1: PMBOKGuide, page 89