You have logged in as a normal user bob and use write and wall to chat with other users. How are
you able to chat with other user terminals?
A.
because the SGID bit is set on both the write and wall commands, and the group ownership is
set to root
B.
because the SUID bit is set on both the write and wall commands, and the group ownership is
set to tty
C.
because the SUID bit is set on both the write and wall commands, and the group ownership is
set to root
D.
because the SGID bit is set on both the write and wall commands, and group ownership is set
to tty