Which three statements are true about the management of Oracle Services?

A.
To manage workloads or a group of applications, you can define services for a particular application or a subset of an application’s operations.

B.
Similar work can be categorized under services to ease workload management,

C.
Users who share a service should have different service-level requirements.

D.
Oracle Enterprise Manager or srvctl should be used to control cluster-managed services, not DBMS_SERVICE.