RC Drill Set 4, Question 10
Increases in the amount of carbon dioxide (CO2)(472 more words not shown)
The author refers to the(13 more words not shown)
- Ashow how differing(13 more words not shown)
- Bargue that any(17 more words not shown)
- Cargue against the(18 more words not shown)
- Dsuggest that there(12 more words not shown)
- Epresent evidence that(14 more words not shown)
Reading the passage
The North American data interrupts the apparently straightforward warming story. The prevailing view finds a global temperature increase; these numerous, accurate observations don't confirm it. So the reference introduces conflicting evidence, giving us a reason the projection isn't as simple as it first sounded.
Working the answers
- A
The discrepancy is introduced, not resolved. We aren't given a method here for deciding which assessment is correct.
- B
Natural fluctuation is raised as a possible cause in the next sentence. The North American data doesn't establish that it is the most likely explanation for any warming.
- C
The challenged result concerns temperature, not the measured rise in CO2. Those are separate parts of the proposed relationship.
- D
Better observations elsewhere might be useful, but the writer doesn't use this reference to call for them. Its role is to complicate the claimed temperature trend.
- ECorrect
The North American data fails to substantiate the reported warming (paragraph 2). It therefore casts doubt on the prevailing account of rising global temperature. That is evidence of uncertainty—not proof that warming is impossible—and it helps set up the question of how to act despite uncertainty.
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