While defining project scope, a stakeholder says a primary contracted feature is inapplicable and that this is documented in lessons learned. What should the project manager do?

The project manager should first check if the information about the feature being inapplicable was indeed documented in lessons learned. This is a critical first step to verify the stakeholder's claim and understand the historical context. If the documentation confirms the claim, the project manager can then assess the impact on the current project, potentially leading to a change request. Requesting the sponsor to cancel the project is premature and drastic without verification. Meeting the sponsor is appropriate after gathering facts, not as a first step. Consulting the team for options is also premature before validating the stakeholder's statement.