Which story is an example of a fable?
a. an arrogant king learns a lesson about being humble when he's tricked into appearing without clothes.
b. a young husband sells his most prized possession in order to buy his wife a gift, not knowing that his wife has done the same thing for him.
c. a hare loses a race to a tortoise because he is overconfident, and he learns an important lesson as a result.
d. a young boy discovers that honesty is the best policy when a lie leads him on a dangerous adventure.