In the provided diagram, item A refers to the Architecture Repository, which is a part of the TOGAF framework where all the architecture assets are stored. This includes the architectural models, patterns, architecture descriptions, and other artifacts relevant to the architecture. Item B is labeled as the Governing Board, which is likely referring to the Architecture Board or a similar governance structure responsible for oversight and decision-making regarding the enterprise architecture. Item C refers to Enterprise Capability, which encompasses the processes, tools, skills, and other capabilities that enable the architecture function within the enterprise.