Which of the following commands is used to display the filenames in multiple columns ?

A. chgrp
B. chown
C. chmod
D. chusr

A. remove
B. rm
C. mv
D. del

A. ls -1
B. ls -t
C. ls -i
D. ls -R

A. ls -l
B. ls -x
C. ls -F
D. ls -a

A. -4
B. -f
C. -1
D. -2

A. tee
B. tr
C. sort
D. grep