Respuesta :
Atticus says that it is a sin to hurt a mocking bird because all they do is sing there harts out, and they don't hurt a soul, they are inncocent !
So your letter option shall be the letter D)
So your letter option shall be the letter D)
It is a sin to kill a mockingbird, because they are innocent and they do nothing more than singing for us and be joyful to us so D.