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GMAT
GMAT Verbal Reasoning Section

Evaluating Group Study Argument

Hard Critical Reasoning Evaluating Arguments

In a recent study, researchers found that students who study for exams in groups tend to achieve higher grades than those who study alone. This has led some educators to argue that group study should be mandatory in schools in order to help all students perform better academically. However, critics of the study argue that it may not be the group study itself that improves academic performance, but rather the students' inherent motivation to collaborate and support each other.

Which of the following, if true, would most seriously weaken the argument that group study should be mandatory in schools?

Hint

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