Explanation
In this question, before heading to the answer choices, we
can briefly refresh our memory about the "air temperature of condensation" by
looking back at the passage. This phrase is referred to specifically only in
lines 31-32: "This technique enables scientists to estimate the air temperature
of condensation when the snow fell and establish variations in temperature over
a series of multiple samples." The clearest inference we can draw is a simple
one, which is that, if you can establish the air temperature of condensation at
a point in the past, you can establish the temperature then or the variations
in temperature. That, in fact, is exactly what answer choice (B) communicates.
Answer choices (A) and (C) both confuse the conditions of measurement and the
conditions we are trying to infer knowledge about in the past. Choices (D) and
(E) are out of the scope of the passage.
The correct answer is (B).
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