''We shouldn't institute year-round school in grades 9-12. Just look at what a disaster it's been for the elementary school. Students hated it!''

What assumption is this argument making?

1.High school students will react the same way as elementary school students to year-round school.

2.Most high schools already have year-round classes.

3.Summer vacations interrupt learning.

4.The preferences of teachers, not students, should determine the length of the school year.