OLS (Ordinary Least Squares) Is Used to Estimate a Linear

Multiple Choice

OLS (ordinary least squares) is used to estimate a linear relationship between a firm's quantity of laptops sold per year and its total promotional expenditures, and the slope of the linear function is found to be positive but not significantly different from zero. Assuming that all other variables, including product price, were constant during the period covered by the data set, this result implies that

A) the firm should spend more on promotional expenditures due to positive slope.
B) the firm should spend less on promotional expenditures due to positive slope.
C) promotional expenditures influence demand.
D) more research is needed, or promotional expenditures have no influence on demand.