GRE Reading Comprehension: ETS-GRE阅读ETS - INUII27A44Y9B3127

What is the main purpose of the third paragraph? A. to distinguish between supracompetitive prices and supracompetitive profits B. to describe the positive use of monopoly power C. to introduce the concept of economies of scale D. to distinguish what is not covered by the antitrust law under discussion from what is covered E. to remind the reader of the issue of consumers welfare