Final answer:
The tar command option to list the files in a tape archive format is 'tvf'. It stands for list ('t'), verbose ('v'), and file ('f'). Other options, 'cvf' and 'xvf', are for creating and extracting an archive, respectively.
Step-by-step explanation:
The tar command option used to list the files in a tape archive format is tvf. The t option tells tar to list the contents, v stands for verbose, which means it will show the details of the files being listed, and f specifies the use of a file for the archive. The command is used in a terminal or command line interface. Here's how you might use it:
tar tvf archive.tar
The command above will list the contents of 'archive.tar' without extracting them. It is crucial to note that the other options mentioned, such as cvf is for creation of an archive and xvf for extracting files from an archive. The option proposed as None of the above is incorrect in this context.