To assist a firm's operating decisions, cost/volume/profit analysis is applicable to all of the following situations except: A. determining a unique break-even point when the firm produces multiple product lines. B. evaluating the effect of replacing a piece of equipment used in the production process. C. setting prices when the firm brings a product to market. D. analyzing whether to make or buy a product used in the production process. To assist a firm's operating decisions, cost/volume/profit analysis is applicable to all of the following situations except: A. determining a unique break-even point when the firm produces multiple product lines. B. evaluating the effect of replacing a piece of equipment used in the production process. C. setting prices when the firm brings a product to market. D. analyzing whether to make or buy a product used in the production process