I didn't see the "none of the above/ no one" option.
That would be my vote. My guess is that if Ainge is targeting anyone, it is someone in the middle of the first who is ready to contribute now, or in one year.
Edit: And that means, to the close reader, that I don't believe that Ainge is really interested in the #2 or #5, but that it is smoke designed to get one or two players to rise a bit in the rankings, so that Ainge's preferred player falls a bit...