Answer:
Option (B)
Explanation:
From the given sentence, the use of the parallelism in the wording has to be taken in consideration. So, as -are so is used in the word -cold, likewise, the word -is so will also be used right before reflective. Then again, as the sentence continues, the phrase "-were it to do so" will provide the consequence of the melting of the ice, which is the first component of the sentence.
Thus, the correct answer is option (B).
The discovery of a fault line along the ocean floor
