16Hit1600
Expression of IdeasVery hardQualifying a claim with a limitation

Expression of Ideas practice question

While researching a topic, a student has taken the following notes: - A trial tested a new hay-fever tablet on 300 adults. - Symptoms fell by 45 percent compared with a placebo. - The trial lasted four weeks. - No children took part. The student wants to report the result while noting a limit on what it shows.

Which choice most effectively uses relevant information from the notes to accomplish this goal?

  1. A. The tablet cut hay-fever symptoms by 45 percent compared with a placebo in a four-week trial of 300 adults, so its effects on children and over longer periods remain untested.Correct
  2. B. The tablet cut symptoms by 45 percent.
  3. C. No children took part in the trial.
  4. D. The trial lasted four weeks.

Answer: A. The tablet cut hay-fever symptoms by 45 percent compared with a placebo in a four-week trial of 300 adults, so its effects on children and over longer periods remain untested.

Result, then the two limits.

Why the other answers are wrong

B. The tablet cut symptoms by 45 percent.
No limit.
C. No children took part in the trial.
A limit without the result.
D. The trial lasted four weeks.
A limit without the result.

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