An organisation treats the Product Backlog as a signed requirements document that may only change through a change request. What has been lost?

• ANothing, provided change requests are processed within one Sprint.
• BThe Product Backlog is emergent by design, so freezing it prevents the adaptation that inspecting the Increment is supposed to produce.
• CThe Developers can no longer estimate the items accurately.
• DThe Scrum Master can no longer facilitate refinement.