What is "natural" about a natural monopoly? a natural monopoly a. is a public enterprise. b. produces a product whose usefulness increases with the number of consumers who use it. c. develops automatically due to economies of scale. d. is the only firm legally allowed to produce a product due to a government copyright. e. develops automatically due to diseconomies of scale.

Cadillac's portfolio consists of sedans, a crossover, a sport utility vehicle, and a high-performance version of the sedan. the sedans are sold through the cadillac dealer network, but the high-performance version is sold in limited volumes and is not available at all dealers. this difference in availability is an example of how the products within the cadillac portfolio are differentiated by the