To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) ls -la - This option will give a long listing of a directory, but it includes hidden files as well. The "-a" flag is used to include hidden files and directories.
Option B) ls -a - This option is the correct answer. It will give a long listing of a directory and include hidden files. The "-a" flag is used to include hidden files and directories.
Option C) ls -xv - This option is incorrect. The "-xv" flags are not used to include hidden files or give a long listing. The "-x" flag is used to sort files by extension, and the "-v" flag is used to sort files by version.
Option D) rm -rf * - This option is incorrect. The "rm" command is used to remove files and directories, not to list them. The "-rf" flags are used to forcefully remove files and directories, and the "*" is a wildcard that represents all files and directories in the current directory.
The correct answer is Option B) ls -a. This option is correct because it will give a long listing of a directory and include hidden files.