Your multitenant container database, CDB1, is running in ARCHIVELOG mode and has two pluggable databases, HR_PDB and ACCOUNTS_PDB. An RMAN backup exists for the database.You issue the command to open ACCOUNTS_PDB and find that the USERDATA.DBF data file for the default permanent tablespace USERDATA belonging to ACCOUNTS_PDB is corrupted.

What should you do before executing the commands to restore and recover the data file in ACCOUNTS_PDB?

A.Place CDB1 in the mount stage and then the USERDATA tablespace offline in ACCOUNTS_PDB.

B.Place CDB1 in the mount stage and issue the ALTER PLUGGABLE DATABASE accounts_pdb CLOSE IMMEDIATE command.

C.Issue the ALTER PLUGGABLE DATABASE accounts_pdb RESTRICTED command.

D.Take the USERDATA tablespace offline in ACCOUNTS_PDB.