Martin Company purchases a machine at the beginning of the year at a cost of $75,000. The machine is depreciated using the straight-line method. The machine's useful life is estimated to be 5 years with a $5,000 salvage value. Depreciation expense in year 4 is:
Multiple Choice
a. $15,000.
b. $14,000.
c. $70,000.
d. $60,000.
e. $0.