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.