题目选项分析

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】Math teachers of students in School X have noted an overall decline in the number of homework assignments completed by students since the school eliminated midday study periods two years ago.