In general, jobs are harder to get in times of economic recession because many businesses cut back operations. However, any future recessions in Vargonia will probably not reduce the availability of teaching jobs at government-funded schools. This is because Vargonia has just introduced a legal requirement that education in government-funded schools be available, free of charge, to all Vargonian children regardless of the state of the economy, and that current student-teacher ratios not be exceeded.
Which of the following, if true, most strengthens the argument?
The key here is the last part of the legal requirement: current student-teacher ratios not be exceeded. This means that as long as the total enrollment of student is not decreasing, there won't be any layoffs among government-funded schools.
B) would strengthen the argument that "any future recessions in Vargonia will probably not reduce the availability of teaching jobs at government-funded schools" due to the legal requirement, since during recession, those who attend expensive private-funded schools might feel the econimical pressure and switch to public-funded school, hence, provide stead streams of new enrollment for the public-funded school. To keep the current student-teacher ratios would not lead to layoffs among the teachers.