What main input can she use to solve the situation?
The question is asking for an input that can be used to address the engagement level of stakeholders. The scenario involves the Monitor Stakeholder Engagement process. Interpersonal and team skills and decision-making are tools and techniques and therefore not the correct choices. Since the project management plan contains the stakeholder engagement plan, which documents the strategy for engagement stakeholders, this is the best option. Other useful components of the project management plan also include the communications management plan and resource management plan.