C. Money plays only a very minor role in people's overall happiness.
Explanation:
In the informational text,<em> High Incomes Don't Bring You Happiness</em> by Caitlin Kenney, the author studies the effects or even the importance of money in one's happiness. The belief that money plays an important factor in one's happiness is a common myth that most people believe to be true.
The writer states that <em>"it is good to have high emotional well being, but it is also good to think your life is going well"</em>. But that doesn't necessarily mean that money brings happiness. Rather contrarily, '<em>the Gallup-Healthways Well-Being Index found that while "life evaluations rise steadily with income," emotional well-being drops off at about $75,000 a year'</em>. This seems to suggest the central idea of the text as money playing only a minor role in the overall happiness of people.