Quantity of Pizzas Produced	Marginal Cost
0	--
1	$12
2	$10
3	$8
4	$5
5	$4
6	$8
7	$12

26. The pizza restaurant reflected in the table above is a firm in a perfectly competitive market. Each time the restaurant sells an additional pizza, its total revenue increases by $5. The marginal cost of producing different quantities of pizza is given in the table above. The marginal cost of the profit-maximizing quantity is ________.

Group of answer choices

$12

$4

$5

$8