（184）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

答案：（C）