D is correct Answer. Build a new cluster, VMotion and DRS will not work with unlike CPU's unless you override the settings as outlined in some of the kb articles. To migrate simply shut them down and cold migrate to the new servers. Once they boot on the new server the VM's should discover any new hardware and you might have to re-boot.
https://communities.vmware.com/thread/101913
Live Migration (vMotion) - A non-disruptive transfer of a virtual machine from one host to another. For a Live Migration, the source host and target host must provide the same CPU functions (CPU flags). Live Migration requires the source and destination hosts to have CPUs from the same manufacturer, and only CPU functions which both hosts support are provided (same CPU generation, or by using VMware Enhanced vMotion Compatibility (EVC)).
Cold Migration - The virtual machine on the original host is first shut down, then started on the new host. When the VM starts on the new host, the VM goes through an Operating System initialization where the Operating System can adapt to utilize all available CPU functions. In cold migration, VMs can be migrated across servers with different CPUs, including different manufacturers, or CPU generations, in most cases.
Correct Answer is D
Intel and AMD are from different families of processors, and therefore have different ways of processing instructions, which make it incompatible when mixing them within the same Cluster for vMotion and DRS tasks.
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