Select all that apply.

• A

  It repairs blocks that have read disk I/O errors.

• B

  It checks whether the alias metadata directory and the file directory are linked correctly.

• C

  It repairs blocks by always reading them from the mirror copy and writing them to the original location.

• D

  It reads the blocks from a good copy of an ASM mirror and rewrites them to an alternate location on disk if the blocks on the original location cannot be read properly.