The answer is to throw away.
Reject most closely means "to dismiss." The choice "to throw away" would describe how the writer is completely against the idea that he or she is too young to make a difference and "dismisses", disregards and does not accept the idea that he or she is too young to make a difference.
-E :)
A protaganist is a person who is against the hero of a movie or a story. can i get a brainliest plz