When marginal revenue is equal to the marginal cost, then the firm should increase the level of production to maximize its profit.
Marginal revenue simply means the increase in revenue that a company makes as a result of selling an additional output of good. Marginal cost is the cost that a company incurs for production of one extra unit of good.
It should be noted that when the marginal cost if a firm is more than the marginal revenue, it means that the firm is producing too much.
When the marginal revenue of the firm equals the marginal cost, then the firm should maximize its profit.
The correct option is A.
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