In Q&A 16.2, under what conditions (if any) would a cost-reducing merger that converts a duopoly into a monopoly cause a Pareto improvement? Would a cost-reducing merger always increase total surplus? Explain briefly. A merger would be a Pareto improvement if it O A. decreased production costs by more than price rises. O B. increased eficiency with no change in market power. O C. increased market power without increasing production costs. O D. decreased competition with a increase in efficiency