QUESTION 17 When might it be better to under-forecast rather than over-forecast? O a. When the cost of returns are high O b. When the cost of lost-sales is more of a concern than the cost of markdowns O c. When customer loyalty is extremely important O d. For durable goods QUESTION 18 Double marginalization and the bullwhip effect occur because one or more supply chain partners are willing to take advantage of other supply chain partners. O True O False QUESTION 19 Firms that benefit from demand planning paradoxically are often not in the position to do it most effectively. O True O False QUESTION 20 Sales and promotions are effective tools to manage demand to a forecast. O True O False