The most important concern for multiple Scrum Teams when they are working from the same Product Backlog is minimizing dependencies between teams. Dependencies are the relationships or constraints that exist between the work items or the teams that affect the delivery of the product 11. Dependencies can cause delays, rework, waste, and quality issues, and they can reduce the agility and value delivery of the Scrum Teams 2233. Therefore, minimizing dependencies between teams is a critical concern for scaling Scrum effectively 112233.

Statement A is incorrect because meeting original scope projections is not a primary concern for multiple Scrum Teams working from the same Product Backlog. Scrum does not prescribe a fixed scope for the product, but rather embraces change and adaptation based on feedback and learning 44. The Product Backlog is a dynamic and emergent artifact that reflects the current understanding of the product vision, goals, and requirements 44. The Product Owner is responsible for managing the Product Backlog and ordering the items in a way that maximizes the value of the product and the work of the Scrum Teams 44. Therefore, meeting original scope projections is not a relevant or realistic concern for scaling Scrum.

Statement C is incorrect because clear definition of requirements is not the most important concern for multiple Scrum Teams working from the same Product Backlog. While having clear and well-defined requirements is desirable and beneficial for the Scrum Teams, it is not always possible or necessary in a complex and uncertain environment 44. Scrum does not require detailed upfront specifications, but rather encourages empirical discovery and experimentation through frequent delivery and feedback 44. The Product Backlog items are refined and clarified by the Product Owner and the Developers as they collaborate and learn more about the product and the users 44. Therefore, clear definition of requirements is not the most critical concern for scaling Scrum.

Statement D is incorrect because making sure there is enough work for everyone on every team is not the most important concern for multiple Scrum Teams working from the same Product Backlog. Scrum does not focus on maximizing the utilization of the Scrum Team members, but rather on maximizing the value of the product and the work of the Scrum Teams 44. The Scrum Teams are self-organizing and cross-functional, which means they can decide how to do their work and have all the skills needed to create a potentially releasable Increment 44. The Scrum Teams pull work from the Product Backlog in agreement with the Product Owner, and they commit to delivering an Integrated Increment that meets the Nexus Sprint Goal 1144. Therefore, making sure there is enough work for everyone on every team is not the most essential concern for scaling Scrum.