Choose the Most Correct answer for relative costs of components of a firm's capital structure. Where: R_S = Rate investors demand on a firm's STOCK R_D = Rate investors demand on a firm's DEBT (i.e., the Yield to Maturity of the firm's debt). WACC = The firm's Weighted Average Cost of Capital t = the firm's tax rate. "<" means "Less Than" ">" means "Greater Than or equal to"

a) R_S > R_D > WACC

b) WACC > R_S > R_D

c) R_S > R_D > R_D(1-t)

d) R_S < R_D(1-t) < R_D

e) None of these relationships is correct.