The return on investment $($ROI$)$ is computed as

a$.$ net income divided by invested assets

b$.$ revenue divided by invested assets

c$.$ operating income divided by invested assets

d$.$ None of the above

When comparing Return on srivestment $($ROI$)$ over time, a favorable trend would be

a$.$ an increase in ROI

b$.$ a decrease in ROI

c$.$ no change in ROI

d$.$ All of the above

The excess of operating income over a minimum acceptable Operating Income is called

a$.$ net income

b$.$ residual income

c$.$ operating income

d$.$ None of the above