Nubela Manufacturing is considering two alternative investment proposals with the following data Investment Useful life Estimated annual net cash inflows for 5 years Residual value Depreciation method Required rate of return Calculate the payback period for Proposal X Proposal X Proposal Y $10,000,000 $530,000 5 years $97,000 $26,000 Straight-line Straight-line 12% 5 years $2,000,000 $57,000 14% O A. 9 years O B. 8 years O C. 4 years O D. 5 years