A project to deliver a proof of concept is being planned, but business and technical stakeholders cannot agree on what should be in the final product. What should the project manager do?

The project manager should identify the root cause of the stakeholders' inability to define the project scope. This proactive step addresses the underlying conflict, allowing for a resolution that facilitates clear scope definition. Without understanding why they disagree, any attempt to move forward will likely encounter the same issues. Including all stakeholders in the charter development (A) is good practice but won't resolve fundamental disagreements without prior root cause analysis. Clarifying benefits (B) might help, but it doesn't address the core conflict over what the product should be. Involving technology suppliers (C) is premature and irrelevant to resolving internal stakeholder disagreements on the product's core definition.