20% of the work was completed in a project. At this stage the project manager determined that the budget at completion (BAC) was no longer viable and developed a forecasted estimate at completion (EAC). What index can the project manager use to look at the calculated projection of cost performance that must be achieved on the remaining work?
A. Schedule Performance Index (SPI)
B. Cost Performance Index (CPI)
C. Cost Variance (CV)
D. To-Complete Performance Index (TCPI)