The most appropriate choice for sentence correction will be given by: how large a role sea otters played (option C).
<h3>What is sentence correction?</h3>
Sentence correction or sentence improvement is a type of grammatical practice where a sentence is given with a word or a phrase that requires grammatical changes or improvement.
Now,
In the given Sentence, "Scientists knew this but did not recognize 30 how large a role they played in helping kelp forests to significantly decrease the amount of carbon dioxide in the atmosphere."
The most appropriate choice for sentence correction will be given by: how large a role sea otters played (option C).
