On average, schools that provide an extra recess period each day during which children are allowed unstructured play score higher on state aptitude tests that schools that do not provide such a recess period. Therefore, the test scores at Malthus Elementary would likely improve if the school adds a recess period of unstructured play.
Which of the following, if true, would most weaken the argument?
(A) Nearly all of the schools providing the extra unstructured recess period provided it to reward
...
Which of the following, if true, would most weaken the argument?
(A) Nearly all of the schools providing the extra unstructured recess period provided it to reward
...
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