16Hit1600
Expression of IdeasHardPresenting a finding with the researchers' caveat

Expression of Ideas practice question

While researching a topic, a student has taken the following notes: - A study of 40 towns compared tree cover with summer temperatures. - Towns with more tree cover were about 2°C cooler in summer. - Towns with more tree cover also tended to be wealthier. - The researchers say tree cover alone cannot be credited for the difference.

The student wants to present the study's finding along with the researchers' caveat. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  1. A. Towns with more tree cover were about 2°C cooler in summer, though the researchers caution that those towns were also wealthier, so trees alone cannot be credited.Correct
  2. B. The study compared tree cover and summer temperatures in 40 towns.
  3. C. Trees lower summer temperatures by about 2°C, which proves that planting trees cools towns.
  4. D. Wealthier towns are cooler because they can afford air conditioning.

Answer: A. Towns with more tree cover were about 2°C cooler in summer, though the researchers caution that those towns were also wealthier, so trees alone cannot be credited.

Finding and caveat together: the 2°C difference and the wealth confound.

Why the other answers are wrong

B. The study compared tree cover and summer temperatures in 40 towns.
The setup, without the finding or the caveat.
C. Trees lower summer temperatures by about 2°C, which proves that planting trees cools towns.
The finding with an overclaim, and no caveat.
D. Wealthier towns are cooler because they can afford air conditioning.
Air conditioning appears nowhere in the notes.

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