What is the result of running the ALTER DISKGROUP DG1 CHECK ALL command?

What is the result of running the ALTER DISKGROUP DG1 CHECK ALL command?

A.
It checks for and repairs inconsistencies found in data for disks in DG1.

B.
It checks for data consistency for disks in DG1 and writes information to the alert log.

C.
It checks for data inconsistencies, notifies appropriate database alert log and fixes nothing.

D.
It checks for and repairs inconsistencies found in metadata for disks in DG1 and writes information to the alert log.