Board Thread:False Info and Speculative Discussion/@comment-10280603-20140708131410/@comment-4753851-20140708154653

For later seasons, the show gives the impression that the werewolf abilities are actually mental rather than physical. Scott can actually prevent himself from healing just because he thinks he thought he shouldn't.

But I would go with option D. The writers chose to do what they wanted and not care about what has happened in past seasons.