(1) Happiness is elusive. (2) People often think that the key to happiness is something like money or beauty. (3) They are mistaken; the key to happiness is not something physical that you can see or touch. (4) There are two keys to happiness: following your dreams and being kind to others.

Which statement best describes the thesis in this sample introduction?

The thesis is clear and focused.
The thesis is not related to the topic.
The thesis does not express the main ideas.
The thesis is missing.