The answer is c. Please explain how to approach answer.

3. A company purchased machinery for $10,800,000 on January 1, 2017. The machinery has a useful life of 10 years and an estimated salvage value of $800,000. What is the depreciation expense on the machinery for the year ended December 31, 2018, assuming that the double-declining-balance method is used? a. $2,160,000 b. $3,888,000 c. $1.728.000 d. $2,000,000 e. $1,600,000