As a firm produces more of a good, the cost of producing each additional unit (increases/decreases). This implies that the marginal cost of producing a good (increases/decreases) as you make more of that good. The supply curve represents .

A. the minimum price sellers are willing to accept to sell an extra unit of a good.
B. the maximum price sellers are willing to accept to sell an extra unit of a good.
C. the maximum price buyers are willing to pay to buy an extra unit of a good.
D. the minimum price buyers are willing to pay to buy an extra unit of a good.