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