Roshumba Is Conducting a Study of Married Couples

Roshumba is conducting a study of married couples. She interviews a number of couples about how their relationships developed. It is likely that she will find that

A) all relationships developed through a fixed sequence of stages.
B) there is considerable variability in how the couples' relationships developed.
C) the couples generally went through the value stage before the role stage.
D) relationship rewards were unrelated to couples' feelings of being in love.