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