Answer:
The correct answer is letter "D": Level of long-term debt.
Step-by-step explanation:
There are four (4) methods companies use to estimate revenues which are the Straight-Line Method (based on constant growth rate), Moving Average (based on repeated forecasts), Simple Linear Regression (compares one independent with one dependent variable), and the Multiple Linear Regression (compares independent and dependent variables).
Long-term debt is not used at the moment of forecasting sales since the studies are focused on past acquisition trends based on the company's operations rather than the on debt firms incur to finance their activities. In other words, the amount of debt a company has does not determine the number of sales.