Refer to tablel which shows efficient levels of production for a pizzeria that only produces pizza and calzones. What is the opportunity cost of producing one more pizza when the pizzeria moves from production level D to level C? Table 1 Efficient Output Combination Quantity of Pizzas Produced Quantity of Calzones Produced A 48 0 B 36 15 C 24 30 D 12 45 E 0 60 60