What is the corporate cost of capital?

a. The corporate cost of capital is not the rate of return required to persuade the investor to make an investment

b. The corporate cost of capital is the cost of debt of a business permanent financing sources

c. The corporate cost of capital is a blend (weighted average) of the costs of a businesss permanent financing sources

d. The corporate cost of capital is not the blended (weighted average) of the costs of a business's permanet financing sources