Depreciation expense is $10,000. The straight-line rate is 10%. The asset has a $500 salvage value. Which statement is true? O Depreciation expense using units of production is always equal to straight-line depreciation expense O Salvage value for determining double declinding balance depreciation expense would be $1000 O Depreciation expense using double declining balance will be $20,000 O Depreciation expense using double declining balance will use a 20% rate.