GMAT
The principal of School X has proposed a plan that would add an hour-long study period to the end of the school day. She claims that the extension would improve the school's average score on the math section of the state assessment by allowing students more time to complete math homework that they wouldn't otherwise have time to complete. Which of the following statements, if true, would most weaken the argument presented above?
【选项】Administrators from neighboring School Y recently implemented a school day extension and have seen no significant improvement in student test scores on the state assessment.
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