The suggested answer is A, E.
In a Workspace ONE UEM on-premises environment, the two core components that are required are Device Services and Console Services. Device Services manages the device lifecycle, profiles, and policies, while Console Services hosts the administrative console necessary for configuration and management. These two components are fundamental to the basic functionality of the platform. Other components like the AirWatch Cloud Connector, Unified Access Gateway, and Secure Email Gateway are additional and may be required based on specific use cases or configurations, but they are not mandatory for all on-premises environments.