A team wants to adopt a Definition of Ready that items must satisfy before selection. How should a Product Owner regard it?

• AAs a requirement of Scrum equivalent to the Definition of Done.
• BAs something only the Scrum Master may introduce.
• CAs incompatible with Scrum and therefore to be rejected.
• DAs a practice outside Scrum that can help, and can also turn into a gate that blocks conversation at Sprint Planning.