Answer:
C) The difference between the earned value and the planned value
Explanation:
In earned value management, the schedule variance is the case which helps to specify and make exact if you are ahead of the schedule or just the behind and also what is the quantity of this being ahead or behind.
The formula for that is: SV=EV-PV
SV- Scheduled Variance
EV-Earned Value
PV-Planned Value
The formula above may be converted in other types because of cost, percentages but the result will be identical.