Nubela Manufacturing is considering two alternative investment proposals with the following data: Proposal X Proposal Y Investment $10,900,000 $590,000 Useful life 5 years 5 years Estimated annual net cash inflows for 5 years $2,180,000 $97,000 Residual value $59,000 $27,000 Depreciation method Straight-line Straight-line Required rate of return 12% 10% Calculate the payback period for Proposal X. O A. 8 years OB. 5 years O C. 10 years OD. 4 years