What action should the administrator take to create a virtual machine with smaller virtual disks than the original physical server?

An administrator needs to migrate a legacy physical application server to a virtual machine within a vSphere 6 cluster. As part of the conversion, the administrator must reduce the size of the virtual disks.
What action should the administrator take to create a virtual machine with smaller virtual disks than the original physical server?
A. Shut down the physical server and use VMware Converter cold cloning with volume-based cloning at the disk level.
B. Use VMware Converter hot cloning with volume-based cloning at the block level.
C. Shut down the physical server and use VMware Converter cold cloning with volume-based cloning at the file level.
D. Use VMware Converter hot cloning with volume-based cloning at the file level.