Which command changes the owner to 'spankme' and the group to 'baby' for bob.txt?

• A. chown spankme bob.txt
• B. chown baby bob.txt
• C. chown spankme:bob.txt
• D. chown spankme:baby bob.txt

Answer: (D)

The command is using the owner:group format to change both attributes in one go. In Linux, chown accepts owner:group followed by the file name, which lets you set the new owner and the new group at the same time. Here, spankme is the new owner and baby is the new group, applied to bob.txt. That exact syntax—spankme:baby bob.txt—changes both fields in one operation.

The other forms either change only the owner (leaving the group as it was) or try to set the group to something not intended (for example, misplacing the file name inside the owner:group portion). So the command that specifies both the owner and the group in one pair before the file is the correct choice.