The correct answer is:
C. It shows that this method is a disadvantage to those who need review at the beginning of the year.
This choice connects with the idea presented in paragraph 3 of "Year–Round Schooling Helps Students, Teachers, and Families," which claims that shorter gaps between school sessions allow students to remember more and that teachers can spend less time reviewing previously covered information. The paragraph from "Schools Should Stick to Traditional Schedules," however, indicates that not all students may benefit from this approach, particularly if they need more review time, suggesting a potential disadvantage of year-round schooling.