QUESTION TYPE: Sufficient Assumption
CONCLUSION: Some older people can lower their blood pressure by drinking milk.
REASONING: Lack of calcium often causes the rise in blood pressure associated with aging. One glass of milk per day has enough calcium to make up for a deficiency. But the deficiency is often caused by a lack of vitamin D that is needed to absorb calcium.
ANALYSIS: This is a bad argument. It presents a problem: we can’t use calcium without enough vitamin D. But then the solution only mentions adding more calcium, and doesn’t address the vitamin D problem.
The correct answer solves this by showing that milk has enough vitamin D to allow calcium absorption.
- CORRECT. This does it. Milk not only provides enough calcium but also the vitamin D to absorb it.
- This shows that milk merely isn’t harmful. But we’re trying to conclude that it will actually improve blood pressure.
- Same as B. This shows that milk doesn’t do damage. But we need to know if it can help.
- That’s good. But it doesn’t tell us how milk helps.
- Yikes. You’d better get some vitamin D. Unfortunately, this doesn’t tell us if milk has vitamin D.
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