Which of the following commands are used to get information on the proper use of ls? (Choose two correct answers.)

'option ls' is not a valid Linux command and does not exist in any standard Linux distribution.

'usage ls' is not a recognized Linux command for retrieving documentation or help information.

'manual ls' is not a valid command - the correct abbreviated form used on Linux is 'man', not 'manual'.

The 'man' command displays the traditional Unix manual page for a given command, providing syntax, options, and descriptions. Running 'man ls' opens the full manual entry for the ls utility.

The 'info' command accesses GNU info documentation, which is an alternative and often more detailed documentation system than man pages. Running 'info ls' opens the info page for ls.