Fromtheinformationbelow,whatcommandwouldtheadministratorruntoallocatethefilebackedopticaldevice,nameduseful_scripts,tovirtualSCSIadaptervhost0?()

A.mkvdev-devuseful_scripts-vadaptervhost0;loadopt-vdevvtopt0

B.mkvdev-opticaluseful_scripts-vadaptervhost0;loadopt-vdevvtopt0

C.mkvdev-fbo-vadaptervhost0;loadopt-diskuseful_scripts-vtdvtopt0

D.mkvdev-typefbo-vadaptervhost0;loadopt-fbouseful_scripts-vtdvtopt0