Respuesta :
D.
The larger the number of students, the greater the number of teachers is likely to be since more staff is required to handle more students.
The larger the number of students, the greater the number of teachers is likely to be since more staff is required to handle more students.
I am pretty sure that the thing which you expect the relationship between the number of students and the number of teachers in each school is positive correlation, because it is an example of relation in which both variables move in tandem.