A study claims that drinking 2 liters of water daily improves concentration. Which supports this claim mathematically?
Correct answer: A. A sample group showed a 15% improvement in focus scores after increasing water intake
- A. A sample group showed a 15% improvement in focus scores after increasing water intake
- B. People drink more water in summer
- C. Water is generally healthy
- D. Students enjoy drinking water
Explanation
Option A is correct because it provides a direct statistical correlation between increased water intake and improved focus, which supports the claim mathematically. Option B is incorrect as it merely states a seasonal behavior without linking it to the claim. Option C, while highlighting the general health benefits of water, does not directly support the specific claim about concentration. Option D is irrelevant to the claim as it discusses preference without any evidence of impact on concentration.
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Critical thinking examines how conclusions follow from evidence, including claims, assumptions, arguments, inferences and relevant facts. Questions ask you to identify hidden assumptions, distinguish strong from weak evidence, assess cause and effect, recognise common reasoning errors, and decide which statement strengthens or weakens an argument.
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