A key stakeholder was engaged at the start of a complex agile project but became less involved as the sprint progressed due to other responsibilities. A few sprints later the stakeholder rejected a feature deliverable and the team is reworking it for the next sprint. What should the project manager have done to prevent this?

The correct answer is "Customized stakeholder communications based on the stakeholders' needs." The project manager should have recognized the stakeholder's decreasing involvement and tailored communication to re-engage them effectively. This could involve shorter updates, highlighting key impacts, or finding alternative ways to solicit feedback. "Involve key stakeholders in decision making" is a good practice but doesn't directly address the cause of the disengagement. The stakeholder was initially involved but became less so. "Analyze changes in stakeholder attributes" is part of a good stakeholder management plan, but the action stemming from that analysis is the customized communication. "Document the project vision and objectives" is foundational but wouldn't prevent a stakeholder from disengaging or rejecting a deliverable if their involvement and communication needs aren't met throughout the project.