One of the tablespaces is read/x7fonly in your database. The loss of all control files forced you to re/x7fcreate the control file.  Which operation do you need to perform after re/x7fcreating 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