Final answer:
The author likely quoted Costello at the end of the article to show a personal perspective that benefits the program, specifically addressing the emotional and spiritual impacts, making option (c) the most correct.
Step-by-step explanation:
The reason why the author concluded the article by quoting Costello is most likely to show the point of view of a person who has benefited from the program. This can be inferred because a quotation is often used to provide a personal testimony or perspective that supports the thesis or main idea presented in the article. The context of the quotation would typically highlight the experiences of individuals as they relate to the overarching subject matter covered in the text, which in this case appears to be about a program that has a positive impact on individuals, perhaps veterans or others who faced difficult challenges.
In evaluating the given options, we can infer that the author's inclusion of Costello's quote is most strongly supportive of the insights and personal growth or well-being that come from participating in the program, making option (c) the most likely answer. Such a conclusion would effectively underline the transformative power of the program's activities on an emotional and spiritual level, thereby effectively wrapping up the narrative and leaving the reader with a powerful lasting impression.
In sum, while each option presents a plausible reason, without the full context of the article and the specifics of the quote, we can surmise based on common literary techniques that quoting an individual at the end of an article is a means to leave the reader with a compelling, personal account of the subject discussed. Therefore, option (c) advanced by the specific details of Costello's experience which might explain the holistic benefits of the program, would be the correct choice.