When Making the Output Decision to Maximize Profit and When

When making the output decision to maximize profit and when output is a discrete choice variable,a manager should choose

A) the level of output where marginal revenue exactly equals marginal cost.
B) the last level of output for which marginal revenue exceeds marginal cost.
C) the output level where marginal revenue is as close to marginal cost as possible.
D) the output level where sunk costs are minimized and total revenue is maximized.