ITIL practice guides benefit organizations by supporting the development of product and service management capabilities, so option C is correct. The guides provide practical, structured guidance for specific management areas and help organizations understand how to perform work effectively in context. They do not prescribe one mandatory technology stack or force all organizations into a single maturity target. ITIL also does not separate product and service management as isolated disciplines; instead, it integrates them through the lifecycle model and the value system. The practice guides help teams understand workflows, roles, measures, interfaces with other practices, and considerations across the Four Dimensions. This makes them useful for building real organizational capability, not just passing exams. Their value lies in practical adaptation and capability improvement across a wide range of management areas.