You want to perform the following operations for the DATA ASM disk group： -Verify the consistency of the disk.  -Cross-check all the file extent maps and allocation tables for consistency. check whether the alias metadata directory and file directory are linked correctly.  -Check that ASM metadata directories do not have unreachable allocated blocks.   Which command accomplishes these tasks（）？

• A、 ALTER DISKGROUP data CHECK
• B、 ALTER DISKGROUP data CHECK DISK
• C、 ALTER DISKGROUP data CHECK FILE
• D、 ALTER DISKGROUP data CHECK DISK IN FAILURE GROUP 1