Which statement is correct about the allocation policy of snapshots?

A.
If one snapshot in a virtual disk family is created using allocation on demand, other snapshots in
the same virtual disk family can be fully allocated snapshots.

B.
If one snapshot in a disk group is created using allocation on demand, all snapshots in the same
disk group must use allocation on demand.

C.
If the first snapshot in a virtual disk family is created using the fully allocated method, all
subsequent snapshots in the same disk group must be fully allocated.

D.
If the first snapshot in a virtual disk family is created using allocation on demand, all subsequent
snapshots in the same virtual disk family will use allocation on demand.