Which statement is correct about Trident storage virtual pools?

Trident storage virtual pools provide a list of additional parameters that can be attached to a Kubernetes Storage Class.

Trident storage virtual pools provide a layer of abstraction between Trident's storage backends and Kubernetes Storage Class.

Trident storage virtual pools provide a predefined set of data in a storage pool that can be used for container boot processes.

Trident storage virtual pools provide a way to monitor backend storage systems and remove unreachable storage from the available Kubernetes Storage Class options.