Answer:
C. True happiness comes from within our-self.
Step-by-step explanation:
I believe the theme is that true happiness means appreciating the things that you have.
True happiness comes from within, and not from material things such as money or other luxurious items. If you remain happy without these things it means you achieved true happiness.
The story shows that gaining knowledge, material resource, foresight and such alternative things doesn't offer one true happiness. True happiness comes from inside ourselves.