You are asked to create some custom VMs to better represent your security environment.

From the Scanning and Rating Components lesson, the Study Guide explicitly states:

" FortiSandbox allows you to modify the number of CPUs and memory assigned to a custom VM. This feature is supported on hardware models and private cloud VMs. "

Hardware models = Device-based (Option C)

Private cloud VMs = Private cloud (Option A)

Azure non-nested mode and FortiSandbox Cloud do not support custom VM creation as per the Study Guide.