Which two tasks are allowed in the X-Lence data center? (Choose two.)

A cluster of vSphere 6.5 and 6.7 hosts all have identical hardware. VMs are created on the 6.7 hosts with virtual hardware version 14. During routine maintenance on the 6.7 hosts, the VMs are unable to migrate to the
6.5 hosts.
Why are the VMs unable to migrate to the 6.5 hosts?

A vSphere administrator has disabled Fault Tolerance on a powered-off VM.
What could cause the VM to fail to power back on?

A vSphere administrator has a requirement to add the identity source with the Integrated Windows Authentication option on vCenter Server with External Platform Services Controller. Which two conditions should be met to complete the task? (Choose two.)

Which feature allows a vSphere administrator to reduce power consumption on a cluster?