The correct answer is D because Aruba Fabric Composer is designed for data-center fabric automation, especially ArubaOS-CX based spine-leaf and EVPN-VXLAN environments. It discovers data-center infrastructure and automates the provisioning and ongoing configuration of both spine-and-leaf fabrics and Layer 2 two-tier topologies. That makes it directly relevant to customers with mixed HPE and non-HPE environments where repeatable fabric deployment, validation, and operational consistency are required. Option A is incorrect because HPE Alletra Storage MP B10000 management belongs to HPE storage management tools such as Data Services Cloud Console and array-specific integrations, not Aruba Fabric Composer. Option B is incorrect because HPE Synergy Virtual Connect is managed through HPE OneView / Synergy Composer, not Aruba Fabric Composer. Option C is also not the best answer because SAN zoning is normally performed through Fibre Channel SAN fabric tools or storage-networking workflows, not through Aruba Fabric Composer as a generic function of ArubaOS-CX 8400. The exam logic is clear: Fabric Composer’s value is accelerating, standardizing, and validating data-center network-fabric provisioning. Reference/topics: Aruba Fabric Composer, data-center fabric automation, ArubaOS-CX, spine-leaf provisioning.