econ problem I need you help

Question 6 Which of the following relationships is NOT valid? O A. Decreasing marginal cost implies that average total cost is also decreasing. O B. When marginal cost is below average total cost, the latter is falling. O C. When marginal cost is above average variable cost, AVC is rising. O D. None of the above.Question 7 4 points Save Answer Don runs a small factory in which he produces lamps. His only variable input is labor. This week he measures the marginal product of labor and finds it equal to 4 lamps per labor hour when he is producing 100 lamps. At the same level of output he calculates the average product of labor to be 5 lamps per labor hour. If he gets more orders this week and hires more labor to increase production over 100 lamps then O A. the average product of labor will increase. O B. the marginal product of labor will increase. O C. the average product of labor will decrease. O D. the marginal product of labor will decrease. O E. Both C and D