A system administrator is unable to delete a stgpool. Which two causes are possible? (Choose two.)

A.
if admin has system privilege

B.
if device class still exists of stgpool

C.
if there is not a single volume assigned to the stgpool

D.
if there is still at least one volume defined to the stgpool

E.
if stgpool is identified as the next storage pool for other storage pools

Explanation: