which two options meet this requirement?

A datastore ran out of space and the administrator needs to avoid a repeat occurrence.
When used together, which two options meet this requirement? (Choose two.)

A.
Enable threshold levels within each datastore property.

B.
Ensure that email notification is enabled.

C.
Use vCenter Chargeback to report on datastore capacity by organization.

D.
Enable threshold levels within each Provider VDC property.