When a space-efficient storage technology such as thin provisioning is used how is storage
usage tracked against a Machine?
A.
 The storage allocated to a provisioned machine is fully committed to that machine, even 
when it is powered off.
B.
 The storage allocated and the storage used are tracked separately and the storage 
allocated is fully committed to the provisioned machine.
C.
 The storage allocated and the storage used are tracked separately and only the storage 
used is fully committed to the provisioned machine.
D.
 The storage allocated to a provisioned machine is fully committed to that machine, only 
when it is powered on.