A company manufactures a variety of camp stoves at different locations The total cost C x in dollars of producing x camp stoves per week at plant A is shown in the figure Discuss the graph of the marginal cost function C x and interpret the graph of C x in terms of the efficiency of the production process at this plant www C x 100 000 50 000 500 1 000 Choose the correct answer below OA The graph of y C x shows that the marginal cost function is positive and decreasing Since marginal costs are decreasin the production process is becoming more efficient as production increases OB The graph of y C x shows that the marginal cost function is negative and increasing Since marginal costs are increasing the production process is becoming less efficient as production increases OC The graph of y C x shows that the marginal cost function is positive and increasing Since marginal costs are increasing the production process is becoming less efficient as production increases OD The graph of y C x shows that the marginal cost function is negative and decreasing Since marginal costs are decreasin the production process is becoming more efficient as production increases