7. According to an article in the Wall Street Journal, neither UPS nor FedEx raised rates during the holiday season of 2014, butboth firms did raise them during the 2016 holiday season. Which of the following statements is correct?
(A) In 2014, neither firm raised rates during the holiday season because they were at the equilibrium of an infinite repeated game.
(B) In 2016, both firms raised rates because they were at the equilibrium of a finite repeated game.
(C) In 2016, both firms raised rates because they were competing to attract additional customers.
(D) UPS and PedEx set output and price over and over again, continually observing their competitors' behavior and adjusting theirown accordingly. This allows them to develop reputations from which trust can arise. As a result, oligopolistic coordinationand coopcration can sometimes prevail.