medium · GMAT Verbal
Argument: A university recently mandated that all freshmen attend a study skills workshop. One year later, the average GPA of the freshman class was 0.2 points higher than that of the previous year's class. The university administration claimed the workshop was the cause of the academic improvement.
Which of the following would be most useful to evaluate the administration's claim?
- Whether the average GPA of upperclassmen who did not attend the workshop also rose during the same academic year.
- Whether the required study skills workshop was led primarily by experienced faculty members or instead by senior students.
- Whether the freshmen who attended the workshop later reported that they personally found the material useful.
- Whether the university administration plans to expand the required workshop to include sophomores and juniors in the next year.
- Whether the admission standards for the current freshman class were more rigorous than those for the previous class.
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