The correct answer is: A. Tree
The tree
command is used to list the contents of a directory, including all subdirectories. It can be used to see the sub-directory structure of a drive.
The list
command is used to list the files in a directory. It does not list subdirectories.
The subdir
command is not a valid command.
The subtree
command is used to list the contents of a directory and all subdirectories recursively. It is similar to the tree
command, but it lists all files and subdirectories, even those that are hidden.