[单选]
Examine the following RMAN script:

Which statement describes the purpose of the script?（）

A . The data file is checked for physical corruption and backed up if found clean.
B . The backup of data file 5 is performed and the interactive messages during the backup are suppressed.
C . The existing backup for the data file is checked and the backup is performed if there are changes in the data file after the last backup.
D . The backup of data file 5 is performed and all SQL statements that are executed during RMAN compilation and their results are displayed

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Examine the following RMAN script:

Which statement describes the purpose of the script?（）

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[单选] Examine the following RMAN script: Which statement describes the purpose of the script?（）

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[单选]
Examine the following RMAN script:

Which statement describes the purpose of the script?（）