ITIL practice guides use a standardized structure to make the guidance easier to understand, compare, and apply across different organizational contexts. That is why option A is correct. A consistent structure helps learners and practitioners quickly locate key areas such as purpose, key concepts, workflows, measures, roles, competencies, information and technology, and capability development. This improves usability without forcing identical implementation. ITIL does not require organizations to implement every practice in the same sequence, nor does it prescribe one mandatory set of tools. In fact, ITIL strongly supports adaptation to context. The standard format provides clarity and coherence while still allowing flexibility. This is especially helpful in product and service management, where many practices interact and need to be understood as part of a broader management system.