Which of the following are requirements for a fully functional VMware HA cluster (Choose Two)?

A.
sufficient capacity to support at least one host failover

B.
access to shared storage from all hosts

C.
compatible CPUs in each host

D.
a minimum of 2 Service Console ports

Explanation:
vSphere Availability Guide ESX 4.0 ESXi 4.0 vCenter Server 4.0, Page 11.

VMware HA provides high availability for virtual machines by pooling them and the hosts they reside on into a cluster. Hosts in the cluster are monitored and in the event of a failure, the virtual machines on a failed host are restarted on alternate hosts. Therefore there should be sufficient capacity to support at least one host failover, (A)

vSphere Availability Guide ESX 4.0 ESXi 4.0 vCenter Server 4.0, Page 20.

All virtual machines and their configuration files must reside on shared storage. So that you can power on the virtual machines using different hosts in the cluster, the hosts must be configured to access that shared storage, (B).