PMP Practice: Obtain Stakeholder Agreement on Scope

Omar Khoury-Sabbagh is leading an agile project for Radiant Lynx Collective to develop a mobile health app. During sprint planning for Sprint 3, the product owner, Deepika Venkatesh, presents twelve new user stories he wants added to the sprint backlog. The development team has historically completed eight story points per sprint with high quality. Kenji insists all twelve stories (totaling 18 story points) are critical for an upcoming investor demo in three weeks. Two developers express concern that accepting this workload will force them to cut testing and likely introduce defects. The team has not yet committed to the sprint backlog. What should Omar do?