What capability areas are included under the category of Improving?

The category of "Improving" within the context of Capability Maturity Model Integration (CMMI) focuses on enhancing the performance of processes and functions to achieve better outcomes. The correct answer emphasizes "Improving performance, Sustaining habit and persistence," which aligns with the goal of continuous improvement in processes and practices.

Improving performance is a central theme in CMMI, as it encourages organizations to refine their processes to enhance efficiency, effectiveness, and adaptability. The notion of sustaining habit and persistence speaks to the importance of maintaining improvements over time and ensuring that beneficial practices become ingrained within the organizational culture. This establishes a foundation for ongoing improvement, allowing organizations not only to make successful changes but also to embed these modifications into their daily operations for lasting impact.

The other options, while they may contain relevant concepts in different contexts, do not align as closely with the foundational principles of improving within CMMI as detailed in the correct answer.