---

Which RMAN backup command is used to create the block-change tracking file？（）  
A: alter database create block change tracking file
B: alter database enable block change file
C: alter database enable block change tracking using file ，/ora01/opt/ block_change_tracking.fil
D: alter system enable block change tracking using file ’/ora01/opt/block_ change_tracking.fil’
E: alter system block change tracking on

---

出自：Oracle认证

显示答案