GMAT Sentence Correction (SC) | Re: QOTD: The survival of coral colonies

The answer has to be option E. My take :

Meaning - The survival of <><><> is being threatened not only by <> but also by <>.

Error analysis - survival --- will use is. threatened not only by <> but also by <>.

POE -

Option A - S-V Error
Option B - S-V Error
Option C - Wrong use of not only but also .. threatened not only by factors x but also by factor y
Option D - Use of like is incorrect here. To present examples we use such as
Option E - Correct

Option
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