Selling Price and amount spent advertising were entered into a multiple regression to determine what affects flat panel LCD TV sales. The regression coefficient for Advertising was found to be +3.0926, which of the following is the correct interpretation for this value?
a. At a given​price, increasing the amount spent on advertising the Sony Bravia over the previous quarter will increase sales by 3.0926​units, on average.
b. A one percent increase in the amount spent on advertising the Sony Bravia over the previous quarter will increase sales by 3.0926 units, on average.
c. At a given price, a one percent increase in the amount spent on advertising the Sony Bravia over the previous quarter is associated with an increase in sales of 3.0926​units, on average.
d. While price negatively affects the number of Sony Bravia LCD​TV's sold, an increase in the amount of money spent on advertising will result in at least 3 additional TV's sold.