单选题You have a read/x7fonly tablespace on read/x7fonly media. You want to perform a media recovery on the existing data files， but using a backup control file. The backup control file indicates that the status of the read/x7fonly tablespace was read/write when the control file was backed up. What should you consider？（）Adrop the readonly tablespace and recreate the tablespace after recoveryBtake data files from the readonly tablespace offline before performing a recoveryCperform a recovery; status of the tablespace in control file will be changed automaticallyDrecovery using backup control file is not possible， so restore all the files from the last full database backup， and then open the database
单选题
You have a read/x7fonly tablespace on read/x7fonly media. You want to perform a media recovery on the existing data files， but using a backup control file. The backup control file indicates that the status of the read/x7fonly tablespace was read/write when the control file was backed up. What should you consider？（）
A
drop the readonly tablespace and recreate the tablespace after recovery
B
take data files from the readonly tablespace offline before performing a recovery
C
perform a recovery; status of the tablespace in control file will be changed automatically
D
recovery using backup control file is not possible， so restore all the files from the last full database backup， and then open the database
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