For income statement purposes, which could depreciation method be used under CAS 4?

For income statement purposes, which could depreciation method be used under CAS 4?
A.Units-of-production
B.Straight-line
C.Sum-of-the-years'-digits
D.Declining-balance
正确答案：Units-of-production；Straight-line；Sum-of-the-years'-digits；Declining-balance