The world market for iron ore is perfectly competitive with many suppliers. Initially the market is in long-run equilibrium. Then an increase in world demand for iron ore occurs. Which of the following is correct? Group of answer choices In the short-run all firms will make negative economic profits After the market adjusts to the change in demand, the new long-run equilibrium price must be lower. After the market adjusts to the change in demand, in the new long-run equilibrium the market price will be higher. In the new long-run equilibrium, after the market adjusts to the change in demand, there will be more suppliers in the market. In the long run, after the market adjusts to the change in demand, firms will make positive economic profits