Katrina Company acquired a truck on January 1, 2016, for $140,000. The truck had an estimated useful life of five years with no salvage value. Katrina used straight-line depreciation for the truck. On January 1, 2017, Katrina revises the estimated useful life of the truck. Katrina made the accounting change in 2017 to reflect the extended useful life. If the revised estimated useful life of the truck is a total of eight years, what is the amount of depreciation expense that Katrina should report in its 2017 income statement?

A) $14,000

B) $17,500

C) $16,000

D) $28,000

I know the answer is C, $16,000. However, how did they arrive at this answer? I would like to see the work for this problem.