medium · GMAT Verbal Reasoning
A researcher claims that the widespread adoption of a new irrigation technique in Region X led to a 15% increase in crop yields.
Which of the following, if true, indicates a flaw in the researcher's reasoning?
- Region X experienced significantly higher-than-average rainfall during the same period the irrigation technique was adopted.
- The new irrigation technique is more expensive to maintain than traditional methods.
- Some farmers in Region X reported that the new technique required more training than expected.
- The 15% increase is higher than the yield increases seen in neighboring regions using different techniques.
- The study did not account for the specific types of seeds used by the farmers in Region X.
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