What vCenter feature does Storage DRS use to automate the load balancing of virtual machine storage?

What vCenter feature does Storage DRS use to automate the load balancing of virtual machine
storage?

A.
vMotion

B.
High Availability

C.
Storage vMotion

D.
Fault Tolerance

Explanation:
http://labs.vmware.com/vmtj/storage-drs-automated-management-of-storage-devicesin-a-virtualized-datacenter