According to Smith and Hamon, Which Is True of Social

According to Smith and Hamon, which is true of social exchange theory?

A) The assumption of maximizing profit ignores altruistic behavior.
B) Social exchange theory does an impressive job of providing a context for predicting and explaining a great deal of human behavior in social contexts.
C) Exchange theory's individualistic focus results in certain limitations.
D) All of the above are true.