Answer:
d. If the WACC is 9%, Project B's NPV will be higher than Project A's.
Explanation:
The internal rate of return is the return in which the NPV is zero i.e cash inflows equal to the initial investment
While the WACC refers to the cost of capital by considering the capital structure i.e cost of equity, cost of preferred stock and cost of debt by taking their weightage
Now if the WACC is 9% so project B NPV would be higher as compared to project A as we can see that project B IRR is greater than the project A IRR
Therefore option d is correct