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

In the context of Phase C of the TOGAF Architecture Development Method (ADM), which focuses on developing an application architecture, the III-RM (Integrated Information Infrastructure Reference Model) serves as a vital resource. The III-RM provides a comprehensive framework that helps organizations understand and visualize the relationships between different application components and the services these components deliver. This model emphasizes the integration and interoperability of applications, making it particularly relevant for addressing application-level concerns during the architecture development process.

The III-RM also supports the identification of application services and their interactions, thereby guiding the design and implementation of application architectures within an enterprise. Consequently, using the III-RM can enhance the overall coherence and functionality of an application portfolio, fulfilling the specific objectives set forth in Phase C of TOGAF.

Other options, while they may pertain to different aspects of architecture, do not directly focus on application-level components and services as the III-RM does.