If you build a hyro-powered electricity system for the municipality of Vancouver. You are the only firm providing this service. You need a river and lots of land for your system, so you also have high fixed costs. You have to provide a large quantity of power to the entire surrounding population, enabling you to decreasing average cost as you produce more. Your monopoly is the result of your: O a. control of a scarce resource or input. O b. economies of scale O c. technological superiority. O d. use of government-set barriers