The purpose of a Tragic drama is to cause Catharsis, that is pity for the main character who is often a better person than ourselves. The purpose of a Comedy play is to mock people who are worse than us and learn from their mistakes. This was defined by Aristotle, so you can fit this definition into your possible answers.
because the audience would be familiar with them as parables were highly popular then. Also, it being a monk, it is supposed to be a serious story that teaches you something, not a funny or obscene story such as those from the Wife of Bath or the Miller.
