A) Which letter region, contain the perfectly competitive equilibrium?B) Suppose a monopolist buys all the individual firms. If the supply curve is the monopolists marginal cost curve, which letter contains the monopolist equilibrium?C) Which equilibrium has a higher price? Which equilibrium has more quantity sold?D) Based on your previous answers, how does increased competition change the market price?

Suppose this demand and supply graph shows the market demand and supply indusny It _ A. Which letter region (the circles) contain the perfectly competitive equilibrium