Final answer:
To assign B. Cassini ownership of the /hr directory and all of its contents, a command like 'chown -R b.cassini /hr' would be used in a Linux or Unix-like system. Option C) Both subdirectories and files is the correct answer.
Step-by-step explanation:
The file or directory owner, which is usually the user who created the file. The owner of a file can decide who has the right to read the file, to write to the file (make changes to it), or, if the file is a command, to execute the file.
To give B. Cassini ownership of the /hr directory, as well as all of its subdirectories and files, you would typically use a command such as chown with the recursive option enabled: sudo chown -R b.cassini /hr
This command changes the owner of the /hr directory to the user B. Cassini and the -R (recursive) option ensures that all subdirectories and files within /hr are also changed to have the same owner.
The correct answer to the question is C) Both subdirectories and files.