單項選擇題

One of the tablespaces is read­only in your database. The loss of all control files forced you to re­create the control file. 
Which operation do you need to perform after re­creating the control file and opening the database?()

A.drop and re­create the read­only tablespaces
B.rename the read­only data files to their correct file names
C.change the tablespace status from read/write to read­only
D.re­create the read­only tablespace because it is automatically removed

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