What should be installed on a VM to enhance performance and enable additional features?

An administrator is installing a Platform Services Controller Instance.
Which two options are available during the installation process? (Choose two.)

An administrator manages a cluster containing Production and Test VMs. Production VMs run on a VSS port group and a storage array separate from the Test VMs. The administrator wants to prevent large (>500GB) file transfers in Test from impacting Production.
Which two configuration changes should the administrator make to achieve this? (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?

Which file extension can export host customization for host profiles?