Which command accomplishes these tasks?

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;