A. Not knowing the hurdle rate will not prevent the calculation of the Accounting Rate of Return or the Internal Rate of Return. However, it will prohibit the company from calculating NPV, because in order to calculate NPV, the future cash flows need to be discounted using the hurdle rate.

B. NPV cannot be calculated unless the hurdle rate is first determined, because in order to calculate NPV, the future cash flows need to be discounted using the hurdle rate.

C. Internal Rate of Return can be calculated without knowing the hurdle rate, because the IRR is the discount rate that causes NPV to be zero.

D. The Accounting Rate of Return and the Internal Rate of Return can be calculated without knowing the hurdle rate.