A group of new virtual machines have been deployed using thin$-$provisioned disks due to the limited storage space available in an environment. The storage team has expressed concern about extensive use of this type of provisioning.

An administrator is tasked with creating a custom alarm to notify the storage team when thin provisioning reaches a certain capacity threshold.

Where must the administrator define this alarm?

A$.$ Datastore

B$.$ Data center

C$.$ Datastore cluster

D$.$ Virtual machine