Given the following target weights, costs of financing, and a marginal tax rate for the firm of 30%, calculate the weighted average cost of capital (WACC). rd = 5.50% Debt: 30% weight rs = 10.20% CE: 60% weight rp = 9.50% PE: 10% weight A. 8.72% B. 7.57% C. 1.66% D. 8.23%