Which of the following is false about the sense of future obligation embodied in the reciprocity rule?

(a) It provides a genuine advantage to societies who live by it.
(b) It allows for the development of sophisticated and coordinated systems of aid, defense, and trade.
(c) It reduces the tendency of one person to start an exchange relationship with another.
(d) Societies train their members to abide by it.

Answer: (c) It reduces the tendency of one person to start an exchange relationship with another.