RC Drill Set 4, Question 11
Increases in the amount of carbon dioxide (CO2)(472 more words not shown)
It can be inferred that(22 more words not shown)
- AThe most effective(15 more words not shown)
- BCostly measures necessary(25 more words not shown)
- CGiven the current(17 more words not shown)
- DScientists' uncertainty about(20 more words not shown)
- EAny measure intended(15 more words not shown)
Reading the passage
What does the writer actually recommend doing? Don't wait for perfect knowledge, but don't begin with every costly measure either. Take independently sensible steps first and keep policy tied to the evidence as it improves. We can use that account to check the answers without inventing a new trigger or a new purpose for the policy.
Working the answers
- A
We aren't given a comparison showing which measures are most effective or how that ranking relates to cost. A recommendation balancing several concerns doesn't establish an effectiveness ranking.
- B
The trigger for considering costlier measures is improved knowledge that warrants them, not temperature already exceeding humans' ability to adapt. This makes us wait for a condition the writer doesn't require.
- CCorrect
The last paragraph proposes initial steps, followed by “more costly measures” as uncertainties diminish. That supports using less costly measures before expensive ones in the present state of knowledge.
- D
A no-regrets policy responds to scientific uncertainty; it isn't said to resolve that uncertainty faster. Choosing actions and improving the forecast are different jobs.
- E
Other environmental benefits are one reason an initial step might make sense, but economic benefits are another. More costly later measures may be justified by new warming evidence. This turns one possible justification for first steps into a requirement for every measure.
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