Where is the Veeam CBT filter driver installed?

Where is the Veeam CBT filter driver installed?

A.
On every managed backup proxy

B.
On every managed server

C.
On every managed VMware server

D.
On every managed Hyper-V or SMB 3.0 server

Explanation:
https://helpcenter.veeam.com/docs/backup/hyperv/changed_block_tracking.html?ver=95