A depreciable asset has an estimated 10% salvage value. At the end of its estimated useful life, the accumulated depreciation would equal the original cost of the asset under which of the following depreciation methods?

(1) Sum-of-the-years-digits; (2) Productivity output.

a.

(1) Yes; (2) No

b.

(1) No; (2) Yes

c.

(1) No; (2) No

d.

(1) Yes; (2) Yes