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.

下列有关世界一体化说法，不正确的是

A．面对世界一体化潮流，亚非走向了自主型的工业化道路

B．世界一体化促进了全球经济文化的交流

C．交通运输工具的改进促进了世界一体化进程

D．世界一体化在政治领域内主要体现为国际关系的日益复杂