Which feature of vCenter server will potentially help automate the load balancing of the ESXi hosts?

You manage a cluster of ESXi hosts using vCenter Server. You notice that some ESXi hosts are
more heavily burdened than others. Which feature of vCenter server will potentially help automate
the load balancing of the ESXi hosts?

A.
Fault Tolerance

B.
Distributed Power Management

C.
Distributed Resource Scheduler (DRS)

D.
High Availability

Explanation:
http://www.vmware.com/support/vsphere5/doc/vsp_vc50_u2_rel_notes.html(search forDRS)