Scientists studying climate change have found that Arctic ice is melting at a rate that is both unprecedented in recorded history and faster than even the most pessimistic models had predicted.
As used in the text, what does the word "unprecedented" most nearly mean?
expected
unmatched
slow
predictable
Correct Answer: B
Choice B is the best answer. The passage emphasizes the rate is beyond "recorded history" and faster than models predicted. "Unmatched" captures this sense of being without equal or comparison.
Choice A is incorrect because "expected" contradicts exceeding predictions. Choice C is incorrect because "slow" contradicts faster than predicted. Choice D is incorrect because "predictable" contradicts exceeding models.