1. Given A and B, they do not know which they prefer (they also do not know that they prefer them equally).
OR
2. They prefer A > B > C > A.
Barring some sort of mental illness or insanity, I fail to see how this is possible. The fact that human action exists means that people have preferences. To act in any way is to express a preference. Let's say I have $60 and someone offers to sell me Skyrim or Arkham City for $60. If I choose to purchase Skyrim, that is what I prefer. If I choose to purchase Arkham City, that is what I prefer. If I choose to purchase neither, I prefer the $60. Those are my only three options and I must choose one of them. Even if I decide by flipping a coin or something, I am then taking action to prefer leaving my decision to a coin flip. In any possible case, a preference is selected.
--
SmartMuffin - Because anything less would be uncivilized - http://img.imgcake.com/smartmuffin/barkleyjpgde.jpg
http://dudewheresmyfreedom.com/