ITIL emphasizes that value stream mapping identifies and visualizes how value flows, while value stream management ensures that the value stream performs effectively over time. That is why option A is correct. Mapping is a diagnostic and analytical activity. It helps organizations understand the current flow of work, information, handoffs, delays, bottlenecks, and opportunities for improvement. Management is broader and continuous. It involves monitoring performance, setting measures, coordinating improvements, adapting to changes, and maintaining the health of the value stream over time. Mapping is therefore one important tool within the larger discipline of management.