Which of the following accurately represents the relationship between happiness and wealth?
a. Rapidly increasing wealth is associated with a slight decrease in happiness because of relative deprivation.
b. Increased wealth increases happiness equally for almost everybody.
c. There is no relationship between wealth and happiness.
d. Gradually increasing wealth is associated with a slight decrease in happiness because of the adaptation-level phenomenon.
e. Increased wealth increases happiness for people who don't have enough money to meet their basic needs.