When you start the X Window System, which series of programs and/or scripts would most closely describe the start-up process?
A. xdm -> xinit -> xinitrc -> Xclients
B. kde -> xinitrc -> xinit -> Xclients
C. startx -> xinitrc -> Xclients -> kde
D. startx -> xinit -> xinitrc -> Xclients
E. startx -> xinit -> Xclients -> xinitrc