The depreciation during the year 'n', in diminishing balance method of depreciation calculation, is calculated by multiplying a fixed percentage 'N' to the

A. Initial cost

B. Book value at the end of (n - 1)th year

C. Depreciation during the (n - 1)th year

D. Difference between initial cost and salvage value

Please do not use chat terms. Example: avoid using "grt" instead of "great".