Sales for a particular type of a product of a manufacturer have been almost consistent over 10 years, however, there has been a steady downward trend over the past 6 years since 2016 to 2022. The company wants to understand what drives the sales of the product. What is the best forecasting technique for the company?

Select one:

a. Trend models

b. Moving averages

c. Exponential smoothing techniques

d. Judgmental methods

e. Regression models