Explanation/Reference:
A: All Oracle Enterprise Performance Management Cloud services other than Oracle Enterprise Performance Reporting Cloud use a common set of four predefined functional roles to control access to service environments: Service Administrator, Power User, User, and Viewer.
B: Identity Domain Administrator Role
As an identity domain administrator, you use the My Services application to manage your own users and their roles. Your view in the My Services application is limited to the users and roles in the identity domains that you have been assigned to manage. You see all the roles at the domain and service levels.
The identity domain administrator role gives a user the following privileges:
Access to all user and role management functions in My Services, including:
Managing User Accounts
Adding and Removing Custom Roles
References: https://docs.oracle.com/cloud/latest/epm-common/
CGSAD/4_managing_epm_cloud_users_roles_predefined_roles.htm#CGSAD-GUID-B8330CA4-13A7-
4D80-9026-A181F50E6D3D