Which of the following are tasks handled by a display manager like XDM or KDM? (Choose TWO correct answers.)

Which of the following are tasks handled by a display manager like XDM or KDM? (Choose TWO correct answers.)
A . Start and prepare the desktop environment for the user.
B . Configure additional devices like new monitors or projectors when they are attached.
C . Handle the login of a user.
D . Lock the screen when the user was inactive for a configurable amount of time.
E . Create an X11 configuration file for the current graphic devices and monitors.

Answer: A,C