Identify a true statement about the relationship between wealth and well-being.
Select one:
A. After a comfortable income level is reached, more and more money produces diminishing long-term returns.
B. People in rich nations report same level of happiness and life satisfaction as those in poor nations
C. People who are super-rich have reported significantly greater happiness than average.
D. Rich people within a country are not happier than working-class people in a country.