The suggested answer is A, B, D.
SD-Access and ACI Fabric share similarities in that they both use overlays to abstract the physical network, which simplifies network design and operation. They also both utilize Virtual Network IDs (VNIDs) to segment the network logically, allowing for isolation and multi-tenancy within the network. Finally, they both use group policies to manage and apply policies to groups of users or devices dynamically based on their attributes, enhancing security and manageability.