You begin with the largest to the smallest. First revise the overall structure. make sure you have introductory paragraph, followed by supporting paragraphs. then summary and closing paragraphs.
After the paragraphs are correct then you can go in and revise sentences that do not belong. either reword or remove.
The final step is the words. making sure they are spelled and used correctly
Why does biff steal?
Biff steals things because it is his passive-aggressive way of getting back at people he feels have unfairly done better in life than he has,
What compels him to steal?
stealing gives him an excuse to quit whatever dead-end job he happens to be in at the moment.
Future?
This pattern of subtle revenge and avoiding of mundane responsibility is exposed to be a nearly life-long pattern for Biff, and one that will continue.
A similar pair would be answer C.