easy · GMAT Verbal

Which new fact most strengthens the conclusion?

1. Defect rates had already been declining at the same rate before rest breaks and continued that trend afterward.
2. Very few of the people measured actually used the change.
3. A separate change occurred at the same time and could explain the result.
4. Comparable shifts using the new break schedule had fewer defects than shifts using the old schedule.
5. The organization expected the result to improve before collecting any data.

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