26. The Volcano Company purchases a machine on 1/1/12 for $100,000. The Straight-Line method of depreciation was used and salvage value was estimated to be zero. On 1/1/16 Volcano sold the machine for $40,000. A gain of $20,000 was recorded. What was the original estimated life of the machine?

A. 4 years

B. 5 years

C. 6 years

D. 8 years