I think it is c because abrasive can be to scrape and abound can be to exist in great quantities or numbers.
They should both restate the claim. Your conclusion could have a Call To Action which tells the reader that you are giving a reference to him/her.
happiness
fun
joy
forwards in time
getting older
partying
getting drunk
having a hangover the next day
staying up till 3am
counting down from 10 at 11:59pm to 00:00am
this what your after?