What is the meaning of the phrase "dilemma of regulation"?
A. Natural monopolies achieve economies of scale, but charge high prices when there is no government regulation; government regulation reduces prices, but results in diseconomies of scale
B. Natural monopolies are profitable, but only if the government permits price discrimination; government regulation to restrict price discrimination reduces monopoly prices, but the regulation also reduces monopoly output
C. The fair return price achieves allocative efficiency, but may produce economic losses; the socially optimal price yields a normal profit but may not be allocatively efficient
D. The socially optimal price achieves allocative efficiency, but may produce economic losses; the fair return price yields a