I need to know in what before I can answer.
Answer:
Your answer for this one would be C! "Change the shape of something"
Explanation:
The full definition of 'reform' is to;
Make changes in order to improve it
So "C" would be the best answer in this case!
13. Command
14.A
15. B.
16. C
17. I'm not positive on this one. However, I am going to guess run on simply because they're should have not been a and in between.