Which of the following statements is true about Return On Investment?

It is the profit achieved through realization of improvements.

It is the outcome that is once compared to the earlier state, which shows a computable increase in a desirable metric or decrease in an undesirable metric.

It is the difference between the benefit achieved and the amount spent to achieve that benefit; it is expressed as a percentage.

It is the extra value produced by establishment of benefits that include long-term outcomes. ROI is a sub-component of VOI.