Table 2-3 Production Possibilities Corn Wheat (Bushels) (Bushels) 2,000 0 1,600 700 1,200 1,300 800 1,800 400 2,200 0 2,500 Refer to Table 2-3. Based on the values in the table, the production possibilities frontier is a. a straight line indicating constant opportunity costs. b. bowed outward indicating increasing opportunity costs. c. bowed inward indicating increasing opportunity costs. d. bowed outward indicating decreasing opportunity costs