Which three statements are true about services and the Resource Manager?

Which three statements are true about services and the Resource Manager?

A.
The Resource Manager can manage the relative priority of services within an instance by
binding services directly to consumer groups if services are mapped to consumer groups by the
DBA.

B.
When a client connects using a service, the service can be mapped to a consumer group,
enabling the Resource Manager to manage work requests by service in the order of their
importance.

C.
The srvctl utility is used to map services to consumer groups.

D.
The Resource Manager offers benefits In managing workloads because priority is given to
business functions rather than the sessions that support those business functions.

Explanation:
A resource consumer group (consumer group) is a collection of user sessions that
are grouped together based on their processing needs. When a session is created, it is
automatically mapped to a consumer group based on mapping rules that you set up. As a
database administrator (DBA), you can manually switch a session to a different consumer group.
Before you enable the Resource Manager, you must specify how user sessions are assigned to
resource consumer groups. You do this by creating mapping rules that enable the Resource
Manager to automatically assign each session to a consumer group upon session startup, based
upon session attributes.
Oracle Database Resource Manager (the Resource Manager) enables you to manage multiple
workloads within a database that are contending for system and database resources.
In addition, the Database Resource Manager can map services to consumer groups. Therefore,
you can automatically manage the priority of one service relative to others. You can use consumer
groups to define relative priority in terms of either ratios or resource consumption.
Oracle Database Administrator’s Guide