A High Availability (HA) cluster is configured to respond to a given number of host failures. The cluster contains virtual machines configured with these settings:
VM1 has a 1GHz CPU reservation and no Memory reservation
VM2 has a 2GHz CPU reservation and no Memory reservation
VM3 has no CPU reservation and no Memory reservation
Given this information, what is the correct slot size for the cluster?

A.
The CPU Reservation should be set to 32MHz and the memory reservation should be set to 32MB plus memory overhead.

B.
The CPU reservation should be set to 1 GHz and the memory reservation should be set to 0MB plus memory overhead.

C.
The CPU reservation should be set to 2 GHz, and the memory reservation should be set to 0MB plus the virtual machine memory overhead.

D.
The CPU reservation should be set to 2 GHz, and the memory reservation should be set to 32MB, plus the virtual machine memory overhead.

Explanation:
Then HA will calculate how much resources are currently reserved for both memory and CPU for powered-on virtual machines. For CPU, those virtual machines
that do not have a reservation larger than 32Mhz a default of 32Mhz will be used. For memory a default of 0MB+memory overhead will be used if there is no
reservation set. If a reservation is set for memory it will use the reservation+memory overhead.
http://www.yellow-bricks.com/2012/06/20/ha-admission-control-basics-part-22/