which two requirements would you use the Database Resource Manager?

For which two requirements would you use the Database Resource Manager?

A.
limiting the CPU used per database call

B.
specifying the maximum number of concurrent sessions allowed for a user

C.
specifying the amount of private space a session can allocate in the shared pool of the
SGA

D.
limiting the degree of parallelism of operations performed by a user or group of users

E.
specifying an idle time limit that applies to sessions that are idle and blocking other
sessions