When a firm produces at an output level at which MR = MC,it is operating at the _____ level.

A) shut-down
B) break-even
C) optimal-output
D) minimum-cost

Marginal Cost

The additional cost incurred from making one more unit of a good or service.

Optimal-output

The level of production that maximizes a firm's profit, where marginal cost equals marginal revenue.

Break-even

The point at which cost or expenses and revenue are equal, resulting in neither profit nor loss.