Final answer:
ARTs in the Scaled Agile Framework (SAFe) should be organized around (d) subsystems and components, as this arrangement supports the collaborative nature of Agile Release Trains and the integration of various parts of the project.
Step-by-step explanation:
When the question asks about how to organize ARTs (Agile Release Trains) around subsystems or features, it is referring to a concept in the Scaled Agile Framework (SAFe). This framework is used to guide enterprises in scaling lean and agile practices. ARTs are long-lived teams of Agile teams, which along with other stakeholders, incrementally develop, deliver, and where applicable operate, one or more solutions in a value stream. The question about organization follows two of the four possible combinations presented: features and components or subsystems and components.
In this scenario, the correct answer in the context of SAFe would be to organize ARTs around subsystems and components. This is because ARTs typically plan, commit, and execute together in fixed iterations and understanding how the components and subsystems interact is vital to the success of the project. Subsystems represent collections of components that perform a specific function within the larger system, and components are the smaller elements that compose these subsystems.