These are the best answers because they ensure that security concerns are addressed in a transparent and consistent way. By adding security criteria to the Definition of Done, the Scrum Team can make sure that every Increment meets a high standard of quality and security. By creating Product Backlog items for specific security concerns, the Scrum Team can prioritize and plan them in collaboration with the Product Owner and stakeholders. References:
* Scrum Guide, page 14: "The Definition of Done is a formal description of the state of the Increment when it meets the quality measures required for the product."
* Scrum Guide, page 15: "The Product Backlog is an emergent, ordered list of what is needed to improve the product."