What are two ways vsphere cluster, enabled with high availability HA and distributed resource scheduler DRS, differs from traditional failover solution? two choose.

What are two ways vsphere cluster, enabled with high availability HA and distributed resource scheduler DRS, differs from traditional failover solution? two choose.
A . After a vsphere HA cluster is set up, all virtual machines in the cluster get failover support without additional configuration.
B . Vsphere HA requires special software and drivers to be installed within the application or virtual machine.
C . If a host fails, vsphere DRS can migrate virtual machines to optimize for increased workloads.
D . Vsphere HA only protects availability of virtual machines installed on a stand alone esxi host.

Answer: A,C