What can be done to inform an administrator when an unacceptably large number of virtual machines are being deployed using thin-disk provisioning?

A group of virtual machines has been deployed using thin disks because of limited storage space availability. The storage team has expressed concern about extensive use of this type of provisioning.

What can be done to inform an administrator when an unacceptably large number of virtual machines are being deployed using thin-disk provisioning?

A.
Modify the default Datastore Usage on Disk alarm with a determined percentage. Create a trigger for the alarm with an email or SNMP notification option.

B.
Use the default Host Storage Status alarm. Create a trigger for the alarm with an email or SNMP notification option.

C.
Find the predefined Thin-Provisioned LUN Capacity Exceeded alarm for each datastore. Set an action to enable the email or SNMP notification option.

D.
Create an alarm for Disk Usage and determine the appropriate amount. Create a trigger for the alarm with an email or SNMP notification option.