Either you go to small or large business firms, reference is always the key. C is the answer. Be ready to provide reference.
When you are hunting a job, you need to find out a strong reference in the firm you are going to apply for a vacant position. If you need to start your career, list down the firms you want to apply, then find out if there are vacant positions, then find out a strong reference there. Then go for the interview. There are more chances of getting a job through reference than to go without reference.