What two options could cause this error?

A vSphere Administrator attempts to enable Fault Tolerance for a virtual machine but receives the following
error:
Secondary VM could not be powered on as there are no compatible hosts that can
accommodate it.
What two options could cause this error? (Choose two.)

A vSphere Administrator attempts to enable Fault Tolerance for a virtual machine but receives the following
error:
Secondary VM could not be powered on as there are no compatible hosts that can
accommodate it.
What two options could cause this error? (Choose two.)

A.
The other ESXi host(s) are in Maintenance Mode.

B.
Hardware virtualization is not enabled on the other ESXi host(s).

C.
The other ESXi host(s) are in Quarantine Mode.

D.
Hardware MMU is enabled on the other ESXi host(s).

Explanation:
https://kb.vmware.com/selfservice/microsites/search.do?
language=en_US&cmd=displayKC&externalId=1008950

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cooldownearth

cooldownearth

AB is OK

https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.troubleshooting.doc/GUID-9E957B10-1009-4B14-B74B-A4BBD51191A5.html

This is why not C:
Once a component is labeled unhealthy by the hardware monitoring system, vSphere will classify the host as either moderately or severely degraded depending on which component failed. vSphere will place that affected host into a new state called Quarantine Mode. In this mode, DRS will not use the host for placement decisions for new VMs unless a DRS rule could not otherwise be satisfied. Additionally, DRS will attempt to evacuate the host as long as it would not cause a performance issue.
(https://blogs.vmware.com/vsphere/2016/10/whats-new-in-vsphere-6-5-host-resource-management-and-operations.html)

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Vsan

Vsan

If HV (Hardware Virtualization) is enabled for the ESX host that is hosting a primary copy of a fault tolerant virtual machine, but not on any other hosts in the cluster, the primary can be successfully powered on, but this error is produced.

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