Select the one best answer from the following: Question 17 options: A) deseasonalized data should be used for forecasting B) seasonalize the base forecast to predict actual demand for future periods C) actual sales should only be compared on a month-to-month basis D) deseasonalized data should be used for forecasting and seasonalize the base forecast to predict actual demand for future periods are best E) seasonalize the base forecast to predict actual demand for future periods and actual sales should only be compared on a month-to-month basis are best