Practice mode Critical Reasoning

Argument: The new medicine is safe, because no side effects were reported during a two-week trial with 20 volunteers. Which of the following, if true, most weakens the argument?

Correct answer B. Side effects of similar medicines usually appear only after several months of use

Explanation

If side effects normally take months to appear, a two-week trial could easily miss them. The trial's location, payment or the tablet form do not affect this.

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Answer checked 11 October 2026 How we write and check questions

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Argument: The new medicine is safe, because no side effects were reported during a two-week trial with 20 volunteers. Which of the following, if true, most weakens the argument?

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Argument: The new medicine is safe, because no side effects were reported during a two-week trial with 20 volunteers. Which of the following, if true, most weakens the argument?

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