A psychologist is attempting to explain the source of various gender differences in mating behavior. When explaining the fact that men tend to prefer younger women and women tend to prefer older men, he claims that this makes sense because older men have more earning potential and resources and younger women are more economically dependent and have youth and beauty to offer. This psychologist's views are most similar to those advanced by the Question options:

a) Learning approach to attraction

b) Social structure theory of attraction

c) Cultural investment theory of attraction

d) Social Exchange theory of attraction