With Regard to the Formula WACC = $\frac { E } { V }$

With regard to the formula WACC = $\frac { E } { V }$ × R_e + $\frac { D } { V }$ × R_d × (1 - T_c) ,which of the statements below is FALSE?

A) T_c is the corporate tax rate.
B) $\frac { E } { V }$ is the equity to firm value ratio.
C) R_e is the cost of equity.
D) R_d × (1 - T_c) is the before-tax cost of debt.