What is the purpose of the xhost program?

A.
Grant or revoke access to a X11 session.

B.
Install all packages and video drivers required to run X11 on a host.

C.
Start the X11 server and announce its availability within the local network.

D.
Send informational messages to all users logged into a host using X11.

E.
Display the MOTD and other important information when a user logs in via X11.

Explanation: