Which of the following is the mathematical expression to calculate the coefficient of? determination?

A. Coefficient of determination? = (1? + Total variation? ) / Unexplained? variation)

B. Coefficient of determination? = 1 minus Unexplained variation? + Total? variation)

C. Coefficient of determination? = (1 minus Unexplained variation? ) / Total? variation)

D. Coefficient of determination? = 1 minus ?(Unexplained variation? / Total? variation)