Which of the following statements is not true about the weighted average cost of capita (WACC) method?

WACC cannot be used to evaluate projects in which the capital structure is significantly different from the firm's overall structure

Average company WACC should not be used for evaluation projects in a multi-segment conglomerate

if WACC is less than IRR of a strip mine project then the NPB of the project will always be greater than zero

WACC adjusts for the tax-deductibility of interest costs

If WACC is greater than the IRR of a project and the cash flows are conventional then the NPB of the project will always be less than zero