Answer:
O four pies
Step-by-step explanation:
Marginal cost is the expenses associated with the production of an extra item. It the cost attached specifically to the production of one more unit.
From the graph, the marginal rise sharply from 0 units to 1 rapidly. Usually, the marginal cost of the 1st unit is equal to its cost price. The second item's marginal cost is the difference between the cost price of the second item and the first item.
From the graph, the marginal cost starts to rise after the fourth item. The marginal cost of the fourth item is the difference between the fourth and third item.