This is a very complex book with lots of underlying themes. Since the main character dies despite its pride and perseverance the correct answer is B. The Nature is a powerful force and should be given great respect and also C. Humans can learn a great deal from animals around them, since the main character learns a lot from a wolf. Almost all of the London's stories about the Great North serve to show that there is something greater than us, that the nature will ultimately win because we do not know how to play by it's rules yet.