What is the purpose of the operating system Unit ID property of a Vdisk?

A.
All operating systems require a unique ID to assign a virtual disk a device name.

B.
Some operating systems require a unique ID to assign a virtual disk a device name.

C.
The operating system Unit ID is automatically generated by the operating system when the drive
signature is written.

D.
The operating system Unit ID contains the information about the selected file system.