Extract:
Caffeine and Pregnancy
The health risks of coffee have long been debated, but a recent study has added another argument against too much coffee consumption. This study looked at the effect of drinking coffee on pregnant women. Conducted by physicians at Kaiser Permanente, the study explored the connection between caffeine and the risk of miscarriage.
This study followed more than 1,000 women who became pregnant within a two year period. The amount of caffeine they drank was logged, as well as which women experienced a miscarriage. The results, as published in the January 2008 issue of the American Journal of Obstetrics and Gynecology, stated that the risk of miscarriage more than doubled in women who consumed 200 mg or more of caffeine per day, about what is found in two cups of coffee.
Why does caffeine carry this risk? Researchers are not sure, but they theorize that the caffeine restricts blood flow to the placenta. This, in turn, can harm the developing fetus. Does this mean the physicians will start advising women to quit drinking coffee while pregnant? Yes and no. Some doctors will certainly take this report to heart and encourage their patients to stay away from more than one cup of coffee a day, just as they recommend not drinking alcohol or smoking cigarettes. Others are not so convinced and doubt that this single study is enough to overturn the established guidelines of the American College of Obstetricians and Gynecologists. Instead, they believe that a lot more research needs to be done.
Based on this passage, what can the reader infer about the advice physicians will give their pregnant patients about coffee consumption?
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A
Almost all of them will advise women to stop drinking any caffeine until after the baby is born.
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B
The majority will ignore the study altogether and continue to advise caffeine in moderation as before.
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C
All of them will demand additional research be done before they change what they tell their patients.
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D
Some will continue to make their normal recommendations about caffeine, while others will be more cautious than before.
A valid inference is that some physicians will maintain current caffeine recommendations while others will adopt more cautious approaches, supported by the passage's description of divided professional opinion.
A) Almost all of them will advise women to stop drinking any caffeine until after the baby is born.
Contradicted by passage, describes divided opinion with some physicians "not so convinced" the study warrants guideline changes, making universal abstinence recommendation unlikely.
B) The majority will ignore the study altogether and continue to advise caffeine in moderation as before.
Overstates certainty, the passage describes professional division without quantifying majority/minority positions or suggesting "ignore" (physicians may consider without changing recommendations).
C) All of them will demand additional research be done before they change what they tell their patients.
Contradicted by passage, some physicians "will certainly take this report to heart and encourage their patients to stay away from more than one cup," demonstrating immediate action without waiting for additional research.
D) Some will continue to make their normal recommendations about caffeine, while others will be more cautious than before.
Directly supported by explicit description of professional division: "Some doctors will certainly take this report to heart..." while "Others are not so convinced...", establishing divergent responses to the same evidence.
Conclusion
Valid inferences must extend logically from textual evidence without overstatement. The passage's explicit description of divided physician responses provides clear support for inferring heterogeneous professional reactions to the caffeine-miscarriage study.