Which one of the following is a potential resource in Phase C and is a reference model focusing on application-level components and services?

The III-RM, or Integrated Information Infrastructure Reference Model, is indeed a valuable resource in Phase C of the Architecture Development Method (ADM) within TOGAF. It provides a structured approach to understanding the relationships between various application-level components and services. This model not only offers clarity regarding how different applications can interoperate but also helps in identifying gaps or redundancies in existing application architectures.

In Phase C, which focuses on the Information Systems Architecture, utilizing the III-RM allows architects to align their designs with the overall enterprise architecture. This reference model is particularly beneficial for identifying the essential services and components necessary to support the business processes effectively. By emphasizing application-level interactions, the III-RM ensures that the architecture remains cohesive and aligned with organizational goals.

Other options presented, such as the ARTS data model and business rules or job descriptions, serve different purposes and do not provide the specific focus on application-level components that the III-RM does. Similarly, while the TOGAF Technical Reference Model offers a broader scope relating to technology infrastructure, it does not focus on the specifics of application-level services as effectively as the III-RM does. Thus, its relevance and specific application to Phase C make the III-RM the most appropriate choice in this context