Consider the below diagram of a natural monopoly. Which of the following is true? Natural Monopoly Demand and Cost Curves Natural Monopoly Demand and Cost Curves Select the correct answer below: There can be multiple producers as long as they split among each other the optimal level of production of 500 planes per year. There is currently a single producer who chooses output level of 500 planes per year. There can be multiple producers each producing 500 planes per year. The optimal level of production of 500 planes per year occurs where there are diseconomies of scale