What is the primary reason for the success of ITIL?

The primary reason for the success of ITIL lies in its role as a common framework of practices that unites all areas of IT service provision, thus enabling organizations to deliver greater value to the business. By providing a set of best practices and guidelines for IT service management, ITIL creates a standardized approach that helps organizations improve efficiency, effectiveness, and customer satisfaction. This unification allows different teams and departments within an organization to work collaboratively towards common objectives, resulting in coherent service delivery and operational excellence.

Moreover, this common framework ensures that everyone involved in IT service management—ranging from senior leadership to operational staff—shares an understanding of processes and responsibilities. This shared understanding is crucial for aligning IT services with the business goals, which directly contributes to the perceived value by stakeholders.

In contrast, while other choices cover aspects of ITIL's capabilities, they do not capture the unifying nature of the framework as effectively as Option B does, which highlights its role in aligning IT services with overarching business objectives.