Which Linux command will mount a virtual disk image named vdisk.img into the file system at $/$ mnt$/$newvdisk$?$

a$.$ mkfs vdisk.img $/$mnt$/$newvdisk

b$.mkf\frac{s}{m}n\frac{t}{v}$disk.img newvdisk

c$.$ mount $\frac{?}{mn}\frac{t}{?}$ newvdisk vdisk.img

d$.$ mount vdisk.img $/$mnt$/$newvdisk