Which two statements about aggregates are TRUE? (Choose two.)

A.
Aggregates must be limited to a single RAID group.

B.
Aggregates may contain multiple RAID groups.

C.
Aggregates can have RAID groups removed.

D.
Aggregates cannot be reduced in size.

Explanation:

http://www.unitek.com/training/netapp/blog/2008/08/raid-groups-and-aggregates/