medium · GMAT Verbal
Researchers observed that adults who report drinking green tea daily have a lower average incidence of a certain digestive disorder than adults who report never drinking it. The researchers conclude that daily green tea consumption protects against this digestive disorder.
Which of the following, if true, most weakens the researchers' conclusion?
- People who already have this disorder are frequently advised by physicians to avoid caffeinated beverages, including green tea, altogether.
- Green tea contains a variety of antioxidant compounds that are also found in smaller quantities in several other common, widely consumed beverages.
- Green tea has been consumed as a staple part of traditional diets in many cultures worldwide for well over a thousand years.
- This particular digestive disorder is somewhat more prevalent among adults over the age of sixty than it is among younger adults generally.
- A cup of green tea generally contains meaningfully less caffeine than a comparably sized cup of ordinary brewed coffee.
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