You need to copy files to a virtual hard disk (VHD) file

You have a computer that runs Windows 7. You need to copy files to a virtual hard disk (VHD) file.
What should you do first?

A.
Run Dism.exe and specify the /image and /online parameters.

B.
Open Windows Explorer, right-click the VHD file and select Open.

C.
Run Diskpart.exe and then run the Select and Attach commands.

D.
Run Imagex.exe and specify the /mountrw and /append parameters.