Difficulty: Medium
Correct Answer: Exercise associated with normal daily activities effectively neutralizes and dissipates the free radicals that are produced as a result of routine bodily processes.
Explanation:
Introduction / Context:
This argument claims that daily antioxidant supplementation is necessary to slow aging. The reasoning links free radicals to cellular damage and aging, then asserts that antioxidants that neutralize these free radicals must be taken as supplements. The question asks which additional fact most seriously undermines this line of reasoning. To weaken the argument, we should look for information that either breaks the link between free radicals and aging or shows that supplements are not necessary because another factor already neutralizes these free radicals effectively.
Given Data / Assumptions:
Concept / Approach:
The conclusion has two key parts: first, that free radicals cause aging; second, that daily dietary supplements of specific antioxidants are necessary to reduce these free radicals. To undermine the argument, we should show that supplementation is not actually necessary. A strong weakening statement will describe an alternative mechanism that already neutralizes or controls free radicals adequately, making extra supplements redundant. Statements about people's attitudes toward aging or about minor details of diet are less relevant to the logical core of the argument.
Step-by-Step Solution:
Step 1: Option A says that most persons are not concerned with aging effects until it is too late to act. This may describe human behavior but does not address whether antioxidants are necessary or effective in slowing aging.Step 2: Option B states that exercise associated with normal daily activities effectively neutralizes and dissipates the free radicals produced by routine bodily processes.Step 3: If normal exercise already neutralizes these free radicals effectively, then the body does not have an excess of free radicals simply from routine processes.Step 4: In that case, daily antioxidant supplementation is not necessary to prevent free radical overload, because exercise is already performing the neutralizing role.Step 5: This directly attacks the argument's claim that supplementation is necessary. If the free radical problem is already handled by exercise, the conclusion about the need for daily supplements is undermined.Step 6: Option C combines A and B, but the weakening force comes entirely from B. A alone does not damage the logic.Step 7: Option E notes that many individuals consume antioxidants in normal food. This may suggest that some people do not need extra supplements, but it does not show that supplementation is unnecessary for everyone, because the quantities might be insufficient.Step 8: Therefore, the statement that most seriously undermines the argument is option B.
Verification / Alternative check:
Why Other Options Are Wrong:
Common Pitfalls:
Final Answer:
The argument is most seriously undermined by the fact that exercise associated with normal daily activities effectively neutralizes and dissipates the free radicals produced by routine bodily processes.
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