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.
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