Company Y uses a double-declining depreciation method while Company Z uses the straight-line method for an asset of the same cost and useful life. Which of the following statements is correct? A) Company Y will have higher depreciation expense in the early years, but Company Z will have the higher depreciation expense towards the end of the asset's useful life. B) Company Y will consistently have higher depreciation expense until residual value is reached. C) Company Z will have higher depreciation expense in the early years, but Company Y will have the higher depreciation expense towards the end of the asset's useful life. D) Company Z will consistently have higher depreciation expense until residual value is reached. Explain your answer in detail. Show all the steps of the correct answer, including the formula used.