"Exadata" integrates software and hardware and is available both "In the Oracle Cloud and customer site" (D). It is offered as Exadata Cloud Service (public cloud) and Exadata Cloud@Customer (on-premises), providing flexibility for hybrid deployments. "Only in a hybrid cloud" (A) is too restrictive, "Only in public cloud environments" (B) ignores Cloud@Customer, and "Only at the customer site" (C) excludes the cloud option. Oracle's documentation confirms Exadata's availability in both OCI and on-premises configurations.