Which one of the following statements about forecasting is true? group of answer choices you should use the simple moving−average method to estimate the mean demand of a time series that has a pronounced trend and seasonal influences. in exponential smoothing, lower values of alpha place greater weight on recent demands in computing the average. the most frequently used time−series forecasting method is exponential smoothing because of its simplicity and the small amount of data needed to support it. the weighted moving−average method allows forecasters to emphasize earlier demand over recent demand. the forecast will be more responsive to change in the underlying average of the demand series.