A) It is the change in total cost resulting from producing one additional unit of output.
B) It is always decreasing as output increases.
C) It equals total cost divided by the quantity of output.
D) It is irrelevant for decision-making.
For Explanation Click Here:
Marginal cost represents the additional cost of producing one more unit. It plays a key role in profit-maximizing decisions as firms compare marginal cost to marginal revenue.