View Exhibit1 to examine the DATA disk group when all the disks are online. 
Why is the rebalancing not performed and the content of the disk group not empty in Exhibit2?
A.Because the disk group is created with NORMAL redundancy
B.Because the disk repair time attribute is set to a nonzero value
C.Because the mirrored extents cannot be rebalanced across the other three disks
D.Because the other three disks have 60% free space, the disk rebalancing is delayed