Which of the Following Correctly Describes the Computation of the Firm's

Which of the following correctly describes the computation of the firm's weighted average cost of capital (WACC) ?

A) (E/V) + R_E + (D/V) + R_D + (1-T_C)
B) (E/V) *R_E * (1 - T_C) + (D/V) * R_D
C) (D/V) * R_E + (E/V) *R_D * (1-T_C)
D) (E/V) + R_E + (D/V) + R_D
E) (E/V) * R_E + (D/V) * R_D *(1-T_C)