Answer:
The correct answer is letter "C": Assign every project a rate equal to the firm's WACC plus or minus a subjective adjustment.
Explanation:
The Weighted Average Cost of Capital or WACC is the discount rate used to discount the future cash flows at the moment to value investment projects. The higher the WACC, the less likely that the company is creating value because it has to overcome more expensive borrowing costs to make a profit. Then, it is better to give similar rates to the different risk-investment projects of a company according to its WACC. If needed, adjustments should be made to adapt it to the type of investment vehicle.