The first step in any communication-related issue is to review the Communications Management Plan and the Stakeholder Engagement Plan to ensure expectations are correctly documented and aligned. These documents define who needs what information, when, and how it should be delivered. PMIS may provide access, but stakeholders may still require proactive updates through preferred channels (e.g., emails, reports).
According to the PMBOK Guide - Seventh Edition (Communication Performance Domain and Stakeholder Engagement), project managers should tailor communications based on stakeholder needs, which are identified through these plans.
Option A is reactive and not process-driven.
Option C assumes a technical failure without verification.
Option D provides a one-time fix but does not resolve the systemic issue of missed stakeholder expectations.
References:
PMBOK Guide - Seventh Edition, Communication and Stakeholder Engagement Performance Domains PMBOK Guide - Sixth Edition, Sections 10.1-10.3 and 13.1-13.3
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According to the PMBOK Guide, the project manager is responsible for managing the project scope and ensuring that the project delivers the agreed-upon features and functionality (Section 5.1). If a stakeholder tells the project manager that the main requested feature in the contract is not applicable, this means that there is a significant change in the project scope, which may affect the project cost, schedule, quality, and customer satisfaction. The project manager should not ignore this information, nor should they ask the sponsor to close the project or pay the penalty, as this may damage the relationship with the customer and the reputation of the organization. Instead, the project manager should check with the team to learn what can be done, and consult an expert if needed, to find out the impact of the scope change and the possible alternatives. The project manager should also communicate with the stakeholder and the sponsor to understand the reason for the scope change, and to negotiate a mutually acceptable solution. This is also consistent with the Professional in Business Analysis (PMI-PBA) Examination Content Outline, which states that one of the tasks of a business analyst is to "assess the impact of a proposed change or solution on the business need, requirements, and stakeholder expectations" (Task 3.4). References:
PMBOK Guide, 6th Edition, Section 5.1
Professional in Business Analysis (PMI-PBA) Examination Content Outline, Task 3.4

The project manager should follow the risk management plan that was developed during the planning phase of the project. The risk management plan should include a risk register that identifies the potential risks, their probability and impact, and the planned responses for each risk. Since the labor union contract negotiation was documented as a risk, the project manager should log the issue and execute the risk response plan that was prepared for this situation. This may involve implementing contingency plans, fallback plans, or workarounds to minimize the negative effects of the risk on the project objectives. The other options are not appropriate because they do not follow the risk management plan or they introduce new risks or changes to the project scope, schedule, or budget. References:
A Guide to the Project Management Body of Knowledge (PMBOK Guide) - Sixth Edition, Chapter 11:
Project Risk Management, pp. 397-441.
PMP Examination Practice Questions: 400 Practice Questions and Answers to help you Pass, Question 400, p. 401.

In an agile project environment, collaboration and flexibility are key. When an SME external to the project team offers a suggestion that could expedite project delivery, it is beneficial to leverage their expertise. The project manager should facilitate collaboration between the current team members and the SME to integrate the suggestion effectively. This approach aligns with agile principles, which prioritize individuals and interactions over processes and tools, and responding to change over following a plan12.
References:
Agile Methodology in Project Management as a Licensed PMP2.
5 Lessons on How Agile can Solve SME's Engagement Issues1.

Effective delegation is crucial for project management, especially when managing a global team across different time zones. The project manager should delegate certain authorities to team members while ensuring that they have all the necessary information to make informed decisions. This approach promotes trust, encourages accountability, and leverages the diverse expertise of the team members. It aligns with the principles of good leadership and project management practices, which emphasize the importance of communication, trust, and empowerment of team members123. References:
* PMI's "Delegation" article1
* "How to Delegate for Project Management" article2