In the short-run; a firm marginal cost curve above the point of shut-down is its? by Sunday | Oct 29 | Economics JAMB | 0 comments A. demand curve B. supply curve C. cost curve D. supply curve Correct Answer: Option B – supply curve Users Also Read These:In perfect competition, the marginal cost curve…If a total cost curve is plotted; marginal cost can…A firm with marginal cost equals to its marginal…The diagram above shows a firm operating under…The relationship between the marginal revenue (MR)…