Which statement is true about expanding an aggregate from 32-bit to 64-bit in place?

A.
All aggregates are automatically converted from 32-bit to 64-bit with the Data ONTAP 8.1
upgrade.

B.
The expansion is triggered by an aggr convert command.

C.
The expansion is triggered by adding disks to exceed 16 TB.

D.
The 32-bit aggregates are degraded and must be Volume SnapMirrored to a new 64-bit
aggregates with
Data ONTAP 8.1 upgrade.

Explanation:
The expansion process is triggered only when you add disks to a 32-bit aggregate such that
the resulting aggregate capacity is greater than 16tb. When disks are added, if the resulting
capacity is less than 16TB, the aggregate will continue to be 32-bit.
Add enough storage to a 32-bit aggregate to increase the size beyond 16TB.
Link: http://www.netapp.com/us/system/pdf-reader.aspx?m=tr-3978.pdf&cc=us