The Formula for Calculating the Accounting Rate of Return for a Capital

The formula for calculating the accounting rate of return for a capital asset is

A) average annual operating income from asset/amount invested in asset.
B) average annual net cash inflow from asset/amount invested in asset.
C) (average annual operating income + depreciation expense) /amount invested in asset.
D) (average annual cash inflows - depreciation expense) /(amount invested in asset + residual value of asset) .