Toughened hiring standards have not been the primary cause of the present staffing shortage in public schools. The shortage of teachers is primarily caused by the fact that in recent years teachers have not experienced any improvements in working conditions and their salaries have not kept pace with salaries in other professions.
Which of the following, if true, would most support the claims above?
The passage rejects one explanation of the shortage of teachers-that it results from toughened hiring standards-and gives an alternative-that it results from deficiencies in pay and working conditions. E provides corroborative evidence for the latter explanation by suggesting that, for many former teachers, poor pay and working conditions were reasons for their quitting the profession. Therefore, E is the best answer.
A, B and D provide evidence that tends to implicate new hiring standards in the staffing shortage, and thus support the explanation that the passage rejects.
C becomes irrelevant in this context.