In an agile project, it is crucial to continuously assess the project's direction and priorities to ensure alignment with business objectives and adapt to changes in the business environment. Reprioritizing the backlog after every iteration allows the project manager and the team to evaluate the value and relevance of user stories in light of any new developments or changes. This practice ensures that the project remains focused on delivering the most valuable features to the business and can adapt to changes quickly and efficiently.
: (Professional in Business Analysis Reference Materials source and documents) A Guide to the Project Management Body of Knowledge (PMBOK Guide) The PMI Guide to Business Analysis Business Analysis for Practitioners: A Practice Guide

The project manager should address the issue directly and promptly with the team member involved. One-on-one dialogue helps reset behavioral expectations and maintains professional conduct when dealing with customers. It also shows leadership and reinforces team norms.
Option A may be necessary later but may embarrass the individual if done publicly.
Option C may show empathy but avoids addressing the issue.
Option D is too broad and doesn't directly resolve the immediate behavior.
Reference:
PMBOK Guide - Seventh Edition, Team Performance and Stakeholder Engagement Domains PMI Code of Ethics and Professional Conduct (Responsibility and Respect)

In situations with conflicting departmental priorities, the project manager should prioritize requirements based on a benefit-cost ratio analysis. This method ensures an impartial and quantitative approach to decision-making. By evaluating the potential benefits against the costs for each requirement, the project manager can objectively determine which requirements will deliver the greatest value to the organization. This approach aligns with best practices in project management and business analysis, which advocate for prioritizing requirements that maximize business value and stakeholder satisfaction123.
Reference:
5 Steps to Master Requirements Prioritization | ProjectManagement.com1
Five Requirements Prioritization Methods - Business Analyst Articles2
How to Prioritize Requirements: A Guide for BAs - LinkedIn3

Probabilistic analysis is a technique that involves considering various possible scenarios and their associated probabilities to develop a budget that accounts for future uncertainties. This method is a common practice in project management to address the inherent risks and uncertainties in project budgets. It allows for a more comprehensive and realistic approach to budgeting, particularly in the face of uncertainties1.
Reference:
PMI's "A Guide to the Project Management Body of Knowledge (PMBOK Guide)"1