One division of the Marvin Educational Enterprises has depreciable assets costing $5, 700,000. The cash flows from these assets for the past three years have been: The current (i.e., replacement) costs of these assets were expected to increase 20% each year. Marvin used the straight-line depreciation method; the estimated useful life is 10-years with no salvage value. For return on investment (ROI) calculations, Marvin uses end-of-year balances. What is the ROI using current costs and net book value? Option A Option B Option C Option D