Which three resources might be prioritized between competing pluggable databases when creating a multitenant container database plan (CDB plan) using Oracle Database Resource Manager?

Maximum Undo per consumer group is a directive scoped to standard resource plans within a single PDB, not available at the CDB plan level for inter-PDB resource governance.

Maximum Idle time is a consumer group attribute used in intra-PDB resource plans to terminate idle sessions, and is not a resource type configurable in CDB resource plan directives.

Parallel server limit is a valid CDB plan directive that controls how many parallel execution servers a given PDB is allowed to use, preventing one PDB from monopolizing parallel query resources.

CPU is the foundational resource managed by Oracle Resource Manager in CDB plans, where shares or utilization limits can be assigned per PDB to ensure fair CPU allocation under contention.

Exadata I/O is a supported CDB plan resource on Oracle Exadata Database Machine, allowing I/O bandwidth to be distributed across competing PDBs using IORM-integrated directives.

Local file system I/O is not a supported resource type in CDB plan directives; Oracle Resource Manager only exposes Exadata I/O at the CDB plan level, not generic local I/O.