If a project with CPI of 0.8 what you tell?

A.
The project is falling behind

B.
The project is using fewer resources than anticipated

C.
The project is consumed more resources than anticipated

D.
The project is running ahead of schedule

Explanation:
If your cost performance index is above 1.0, it indicates that you have cost that are less the estimated CPI = EV/AC (Earned Value/Actual Cost)

CPI greater than 1 is good (under budget):

< 1 means that the cost of completing the work is higher than planned (bad);
= 1 means that the cost of completing the work is right on plan (good);
> 1 means that the cost of completing the work is less than planned (good or sometimes bad).
Having a CPI that is very high (in some cases, very high is only 1.2) may mean that the plan was too conservative, and thus a very high number may in fact not be good, as the CPI is being measured against a poor baseline. Management or the customer may be upset with the planners as an overly conservative baseline ties up available funds for other purposes, and the baseline is also used for manpower planning