In RMAN, when the RESYNC CATALOG command is issued, in which two situations does the command file actually perform synchronization?()
A、A.After the COPY command.
B、B.After adding a data file in the target database.
C、C.After adding a tablespace in the target database.
D、D.After adding a tablespace in the catalog database.
E、E.After dropping a data file in the catalog database.
F、F.After running SQL Loader to load a large amount of data.