题目选项分析

At Learnington Academy, a high percentage of students are currently failing their classes, as overcrowding is making it difficult for them to receive the individualized attention from teachers that would allow them to pass. Enrollment is predicted to increase by 25 percent over the next three years. Learnington's administration has decided to hire only 10 percent more teachers for this time period, anticipating that this will be sufficient to ensure that the number of students failing because of lack of attention will not increase.

Which of the following, if true, provides the strongest grounds for the administration's prediction?

【选项】The ten percent increase in the number of teachers can be hired without increasing Learnington's expenses by the same amount.