To enable inter-VRF communication, one must configure settings that allow subnets to be advertised externally and establish contract interfaces between VRFs. Option B, “Enable Advertise Externally under the subnet scope,” allows subnets to be advertised outside their home VRFs. Option E, “Export the contract and import as a contract interface,” enables communication between different VRFs by creating an exportedcontract from one VRF that can be imported into another as an interface contract. References := Implementing Cisco Application Centric Infrastructure Official Cert Guide