This is one of the questions that look like a math question bu really isn't as long as you know the definitions of all the performance indices and variances.
The project is 50% complete and 60% into the schedule. It is BEHIND Schedule - therefore the project's SPI is less than 1. Therefore only A or C can be correct.
In terms of time they are at 2.5 months worth of earned value but they have burned 3 months of Planned Value. Therefore they are -0.5 months in Schedule Variance.
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