You need to copy a file from the image

You run Dism.exe as shown in the exhibit. (Click the Exhibit button.) You need to copy a file from the image.
What should you do first?

A.
Run imagex /cleanup.

B.
Run dism.exe /cleanup-wim.

C.
Run imagex /mount e.\sources\boot.wim 1 c.\empty.

D.
Run dism.exe /mount-wim /wimfile.e.\sources\boot.wim /index.0 /mountdir.c.\empty.