Answer:
is that our brains are not finished maturing by adolescence, as was previously thought. Adolescent brains "are only about 80 percent of the way to maturity," she said at the annual meeting of the Society for Neuroscience in November. It takes until the mid-20s, and possibly later, for a brain to become fully developed.
Explanation:
C) The infinitive to learn acts as an adverb in the sentence
Do you have the paragraph if you do look for an evidence to see if it can support your answer I swear I would help if I have read it all and work get you the answer