A minimum viable product (MVP) is a concept from Lean Startup that stresses the impact of learning in new product development. It is the simplest version of a product that allows a team to collect the maximum amount of validated learning about customers with the least effort. An MVP can help a project manager to deliver value to the customer faster, test the market demand, and reduce the risk of failure. To create an MVP, the project manager needs to review the project backlog and prioritize the features that are essential to solve the customer's problem or satisfy their need. The project manager can use agile methods such as user stories, story mapping, and MoSCoW prioritization to identify and rank the features. The project manager can then plan and execute the development of the MVP within the expected timeline and gather feedback from the customer and stakeholders to validate the product and make improvements. References:
* MVP Definition and Examples | Project Management Glossary - Jexo
* What is a Minimum Viable Product (MVP)? | Agile Alliance
* MVPs and MBIs - Project Management Institute

A communications management plan is a document that defines how important information will be communicated to stakeholders throughout the project12. It should include the purpose, methods, frequency, and roles of communication, as well as any contractual obligations that may affect the communication process12.
By ensuring that the communications management plan covers contractual obligations, the project manager can avoid any confusion or conflict between the subcontractors and the client, as well as establish clear expectations and boundaries for communication. This can help improve the quality and efficiency of communication, as well as the overall success of the project12.
1: How to Create a Project Management Communication Plan 2: How to create a project management communication plan - Lucidchart

The introduction of new requirements during the implementation phase can lead to scope creep, which may adversely affect the project's cost and schedule baselines. To manage this, establishing a proper governance structure is essential. This structure would include a change control board or similar entity to evaluate the impact of new requirements and make decisions on their inclusion in the project. This ensures that all changes are assessed for their implications on the project's objectives and resources before being approved1.
: = The need for a governance structure to manage changes and its role in maintaining project baselines is supported by best practices in project management as outlined in the PMBOK Guide2. Additionally, the Professional in Business Analysis (PMI-PBA) materials emphasize the importance of governance in change management and the role of business analysts in assessing the impact of changes34.

According to the Agile Practice Guide, the definition of done (DoD) is a clear and concise list of requirements that a deliverable must adhere to for the team to consider it complete. The DoD helps to ensure that the quality standards and customer expectations are met, and that there is a consistent understanding of what done means among the team and the customer. Therefore, the project manager should have included all relevant criteria in the agreed upon DoD, and crafted a shared product vision that aligns with the customer's needs and goals. This would have helped to prevent the customer from rejecting the deliverables at the end of the iteration. Involved the customer more in the planning process for the project, and ensured agreement on the proceedings may be a good practice, but it is not the best answer. The customer may still reject the deliverables if the planning process does not result in a clear and agreed upon DoD and product vision.
Provided the customer with the backlog and the specified user stories at the beginning of the iteration may be helpful, but it is not sufficient to prevent the customer from rejecting the deliverables. The backlog and the user stories may change during the iteration, and they may not reflect the quality criteria and the customer expectations. Developed the DoD in close cooperation with all stakeholders to ensure their expectations were included may be a good practice, but it is not the best answer. The DoD should be developed with the customer, not with all stakeholders. Some stakeholders may have different or conflicting expectations than the customer, and they may not be the ones who accept or reject the deliverables. References: Agile Practice Guide, Chapter 3, Section 3.2.2 (Definition of Done) and Section 3.2.3 (Product Vision)

In distributed or virtual teams, poor communication and lack of effective collaboration tools can severely hinder progress. Before escalating to the sponsor or modifying the rollout strategy, the project manager should first assess the team's ability to collaborate and identify if technical or communication barriers are the root cause.
The PMBOK Guide - Seventh Edition (Chapter on Team Performance Domain) emphasizes the need to support remote and distributed teams with adequate tools and processes. The Agile Practice Guide also recommends leveraging technology to bridge gaps in distributed agile teams.
Option A is premature without addressing the root cause.
Option B can backfire and does not solve collaboration issues.
Option D might be a long-term strategy but is not the first corrective step.
References:
PMBOK Guide - Seventh Edition, Team Performance Domain
Agile Practice Guide, Chapter 4 - Working with Distributed Teams
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