Which of the following is most appropriate for use in a business letter proposal? The fund-raising club has organized over fifty successful fund-raising events for various non-profits; we are responsible, trustworthy, and will handle your event with care. A radio-ad campaign at the local radio station will cost approximately $500; you can reach the same number of people by placing your name on our uniforms. This will cost you only $300. If you wish you improve your own image in the community, you ought to consider supporting our cause. People are more likely to respect a business that gives back. A and b are both appropriate. C is in not appropriate because it is a logical appeal.