Answer:
Bro you will never know what is life ,Sometimes life becames so Pain,you think to remove your self from the world of pain,but for full filling your dream you will start hard work you will fail again restart it's a continous process which you will never see but its going and going you will never know.
Nice question.You shoild find your self what it is than you will understand rather than my opinion.Hope you undertand what i meant to say
I believe the answer is A.) However because it is used to show how petroleum is different than coal which is a contrast.
