The appropriate answer for this question should be option D . where the marginal resource cost is equal to their MRP.
A business that seeks to maximize profits will hire workers up until the wage rate exceeds the marginal output of labor. The firm should increase hiring if the marginal product of labor exceeds the wage rate until the two quantities are equal.
According to the profit-maximizing rule, a company recruits workers up until MRP = MRC (or MRP = W in competitive labor markets).
Thus, option D is satisfying the condition of the profitability of the firm.
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