I dont know about anyone else but the fact that you kept writing "n" instead of "and" really bugs the s*** out of me. Especially since it only seems to be laziness as you managed to type out the whole word out at the end of your thread! Please dont abbreviate too much as people will just end up not reading your threads.
Now that I've got that out of the way - this has indeed been discussed to death. This was one of the more ambiguous parts in the book that could have been interpreted in a number of ways, depending on the reader. There was the choice of Snape or Karkaroff, but the 'Loyal' one was Barty Crouch Jnr, and that was well evident in the book.
"Now Now Draco... Play nicely"
Harry Potter and the Chamber of Secrets