The "Architecture Owner" in Disciplined Agile is responsible for addressing and mitigating key technical risks within a project. This role ensures that the architecture of the solution aligns with the strategic and tactical goals of the organization, guides the team in making architecture-related decisions, and helps in managing technical debt.
Options B (removing impediments) and C (working cross-functionally to deliver the solution) are responsibilities of the Team Lead or Scrum Master. Option D (determining priorities for the solution) is typically the role of the Product Owner.
References:
* PMI's Disciplined Agile Senior Scrum Master (DASSM) curriculum materials.
* "Choose Your WoW! A Disciplined Agile Delivery Handbook for Optimizing Your Way of Working (WoW)", PMI.