During the first demonstration of the software on a medium-sized project, the product owner identifies several issues they want addressed before giving approval. How should the project manager respond?

The correct approach is to plan to address the issues through backlog grooming and incorporate them into the next sprint. In an agile environment, demonstrations (or reviews) are opportunities for feedback. The product owner's role is to represent the stakeholders and validate the product increment. Issues identified are valuable feedback that should be prioritized and integrated into the product backlog for future sprints, reflecting agile's iterative and adaptive nature. Referring the product owner to a change management plan or escalating to a steering committee is overly bureaucratic and not aligned with agile principles of continuous feedback and adaptation. Referring to a signed business requirement document and refusing changes is rigid and contradicts agile's flexibility. Telling the product owner issues will be addressed in a "second version" dismisses immediate feedback and delays resolution, which is not ideal in agile.