During a retrospective, many team members reported they cannot complete iteration tasks because of interruptions and requests for help from other teams. As the team facilitator, what should the project manager do to prevent this?

The correct answer is to identify root causes and set ground rules. This directly addresses the problem by investigating why interruptions occur and establishing clear expectations for team interaction, fostering a more focused work environment. Meeting with affected team members and telling them not to reduce capacity is dismissive and doesn't solve the underlying issue. Hiring a coach for all teams is a broad solution that may not directly address this specific, immediate problem and is a significant organizational change. Suggesting the team improve planning and break stories into smaller pieces might help with internal efficiency but doesn't resolve external interruptions.