Finish the lyrics I still see your shadows in my room
Can't take back the love that I gave you
It's to the point where I love and I hate you

And I cannot change u so I must replace u

Explanation:

Easier said than done

I thought you were the one

Listen in' to my heart instead of my head

You found another one

But I am the better one

I won't let you forget me

i think the answer could be either a or b because both are part of the post production part. hopefully this you a little.