---

You have enabled backup optimization in RMAN. You issue the following RMAN command to configure a redundancy-based retention policy：   CONFIGURE RETENTION POLICY TO REDUNDANCY 3；   Which statement is true？（）  
A: The command fails because you cannot configure a redundancy-based retention policy when backup  optimization is enabled
B: Backup optimization is performed， but RMAN considers the redundancy-based retention policy when it determines which datafiles should be backed up
C: Backup optimization is permanently disabled
D: Backup optimization is temporarily disabled because a redundancy-based retention policy is specified

---

出自：Oracle认证

显示答案