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Information and IdeasVery hardFinding that weakens a claim about a cause

Information and Ideas practice question

A café claims that its new loyalty card increased its takings, since takings rose 20% in the month after the card was introduced.

Which finding, if true, would most directly weaken the café's claim?

  1. A. The month after the card was introduced was the first month of the tourist season, and takings at the café have risen by about 20% in that month every year.Correct
  2. B. The card is popular with regulars.
  3. C. The card was printed locally.
  4. D. Takings are counted daily.

Answer: A. The month after the card was introduced was the first month of the tourist season, and takings at the café have risen by about 20% in that month every year.

A seasonal rise that happens every year explains the 20% without the card.

Why the other answers are wrong

B. The card is popular with regulars.
Popularity doesn't show it raised takings.
C. The card was printed locally.
Irrelevant.
D. Takings are counted daily.
Irrelevant.

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