In the Mind of Adam Smith,what Is True If Person

Multiple Choice

In the mind of Adam Smith,what is true if person A voluntarily sells a good or service and person B voluntarily buys it?

A) A will benefit but B may or may not benefit.
B) B will benefit but A may or may not benefit.
C) Both A and B would benefit.
D) It is possible that both will benefit or that neither will benefit.