During sprint planning, the product owner presents several new high-priority user stories that emerged from recent customer feedback. The development team expresses concern that adding these stories will impact their ability to complete previously committed work and maintain sustainable pace. What should the project manager do FIRST?

Add the new stories to the sprint since they represent important customer feedback and are high priority

Reject the new stories since they weren't in the original sprint planning and would disrupt commitments

Facilitate a discussion about team capacity, business priorities, and sustainable approaches to managing the new requirements

Ask the team to work additional hours to accommodate both the original commitments and new high-priority work