Selling Price and Percent of Advertising Budget Spent Were Entered

Selling price and percent of advertising budget spent were entered into a multiple regression to determine what affects flat panel LCD TV sales.Use the output shown below, determine
The amount of variability in Sales is explained by the estimated multiple regression model. Response Variable is Sales
$\begin{array} { l r r r r } \text { Predictor } & \text { Coef } & \text { SE Coef } & \text { T } & \text { P } \\ \text { Constant } & 90.19 & 25.08 & 3.60 & 0.001 \\ \text { Price } & - 0.03055 & 0.01005 & - 3.04 & 0.005 \\ \text { Advertising } & 3.0926 & 0.3680 & 8.40 & 0.000 \end{array}$
$$S = 10.6075 \quad R - S q = 84.4 \% \quad R - S q ( a d j ) = 83.3 \frac { 8 } { \circ }$$

A) $15.6 \%$
B) $6.9 \%$
C) $84.4 \%$
D) $29.7 \%$
E) None of the above.