For a Long While, Electricity Producers Were Thought to Be

Multiple Choice

For a long while, electricity producers were thought to be a classic example of a natural monopoly. People held this view because

A) the average cost of producing units of electricity by one producer in a specific region was lower than if the same quantity were produced by two or more producers in the same region.
B) the average cost of producing units of electricity by one producer in a specific region was higher than if the same quantity were produced by two or more produced in the same region.
C) the marginal cost of producing units of electricity by one producer in a specific region was higher than if the same quantity were produced by two or more producers in the same region.
D) electricity is a special non-excludable good that could never be sold in a competitive market.