Which of the Following Is NOT a Formula for Computing $r^2$

Which of the following is NOT a formula for computing the coefficient of determination?

A) $r^2$ = 1 - $\frac{Explained variation}{Total variation}$
B) $r^2$ = $\frac{Total variation - Unexplained variation}{Total variation}$
C) $r^2$ = 1 - $\frac{Unexplained variation}{Total variation}$
D) $r^2$ = $\frac{Explained variation}{Total variation}$
E) All of the above are formulas for computing the coefficient of determination.