Which two conditions could prevent HA from powering on a virtual machine? (Choose two.)

A.
There is not enough free memory to meet the guests memory reservation.

B.
The virtual machine has been assigned a required affinity rule.

C.
Strict admission control is disabled for the HA cluster.

D.
The vCenter is hosted on the ESXi host that failed.

Explanation:
http://pubs.vmware.com/vsphere-50/index.jsp?topic=%2Fcom.vmware.vsphere.troubleshooting.doc_50%2FGUID-A7C83499-FA81-4893-8376-A4B91AC81FA7.html