Answer:
(C) What the current student-teacher ratio in Vargonia's government-funded schools is.
Explanation:
All other option slisted below the question address issues not pertinent to the argument of the excerpt:
A- The legally required ratio does not extend to schools not funded by government;
B- The number of qualified applicants for teaching positions is at best secondary to the argument
D- The proportion of workers who currently work as teachers in government-funded schools is another point that is far from the essence of the excerpt.
Hence, C is the correct answer.