I am not convinced on why i should not pick (A).
The current student-teacher ratio at Vargoniaâ€™s government-funded schools is higher than it was during the most recent period of economic recession.
If the current student-teacher ratio is 100/10 (i.e. 10 teachers for 100 students), then it follows (unlike ywilfred's thoughts in his first explanation) that if this ratio (100/10) were higher than during recession, then more teachers were employed. For 100/10 to be greater than a ratio, 100/x (where x is the no. of teachers), then x must be greater than 10.
Generally speaking, (A) offers typical statistics that support the argument.
IMO, the other choices are either out-of-scope or unnecessary. The reasoning being applied to (B) is like building a castle from nothing! Hmmm, i wish the OA were available.
I do see where you getting at here. You're treating the current situation given in choice (A) as 'future' (as required by the passage) and the recently passed resession at 'past' - the reasoning I made in my later threads.
Unfortunately, we do not have the OA for this one. I'll have a look at my CR bank and see if this one pops up. If so, I'll post the OA (no guarantees though