There is only one answer but what is the answer.
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 :)
The answer would be d because music doesn't necessarily require physical activity unless you are in the marching band. Hope this helped! :)<span />