Explain how to get IRRs for this question, Thank you.

opportunity? (Hint: Consider the number of sign changes in the cash flows.) If the cost of capital is 8.1%, what does the NPV rule say? What does the IRR rule say about whether you should accept this opportunity? (Select the best choice below.) A. There are two IRRs, so you cannot use the IRR as a criterion for accepting the opportunity. B. Reject the opportunity because the IRR is lower than the 8.1% cost of capital. C. The IRR is 8.18%, so accept the opportunity. D. Accept the opportunity because the IRR is greater than the cost of capital. If the cost of capital is 8.1%, what does the NPV rule say? (Select the best choice below.) A. Since the NPV is greater than or equal to zero, accept the opportunity. B. Since the NPV is less than zero, reject the opportunity. C. The NPV rule cannot be used because there are two IRRs. D. The NPV rule cannot be used because there is no IRR