What file should you edit to change the default background for it?

You have just set up the X Display Manager as your default display manager. What file should you
edit to change the default background for it?

A.
/etcyX11&drrVXsetup

B.
/etc/X11/prefdm

C.
/etc/X11/XF86Config

D.
/etc/X11/xdm.conf