Which of the following statements concerning Cost of Capital are true? 1. The cost of capital is not a cash cost but an opportunity cost. II. The cost of capital for business units with different risk profiles is likely the same. III. Cost of capital, required return and expected return are used interchangeably. IV. A company's cost of equity capital is what investors could earn by investing in a broad portfolio of companies, adjusted for the riskiness of the company relative to the average of all companies. O I, III and IV only. O I and II only. OI and III only. OI and IV only