In the short run, there are 500 identical firms in a competitive market. The firms do not use any resources that are available in limited quantities, and each of them has the following cost structure: Output Total Cost $0 $10 $12 $15 $24 5 $35 Which of the following is a point on the long-run supply curve? Select one: O a. P=$5, Q=500. O b. P=$5, Q=1,500. O c. P=$6, Q=1,000. O d. P=$10, Q=500