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Opposite-Effect Distractors
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LSAT
LR.212 Opposite-Effect Distractors
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A charity's donations increased after it launched a monthly email newsletter. The charity concludes that the newsletter caused the increase. Which fact most weakens that conclusion?
A
The newsletter includes photographs of volunteers.
B
In a randomized email test, recipients of the newsletter donated more than comparable recipients who received no newsletter.
C
The charity simultaneously added thousands of previous donors to its solicitation list just before the annual tax-deduction deadline.
D
Donors can give by credit card or bank transfer.
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