Lakeside Co. recently determined that one
题型：单项选择题
问题：
Lakeside Co. recently determined that one of its processing machines has become obsolete three years early and, unexpectedly, has no salvage value. Which of the following statements is most consistent with this discovery （）
A. Historically, economic depreciation was understated.
B. Lakeside Co. will owe back taxes.
C. Historically, economic depreciation was overstated.