Final answer:
The Shamrock fundraiser benefits the American Cancer Society, a national organization focused on cancer research, prevention, and support services.
Step-by-step explanation:
The national organization that the Shamrock fundraiser benefits is the American Cancer Society. The American Cancer Society is a well-known non-profit organization in the United States that focuses on cancer research, prevention, and support services. They provide funding for research initiatives, offer educational programs, and support services to individuals affected by cancer.
The American Cancer Society uses funds raised through events like the Shamrock fundraiser to support their various programs and initiatives. For example, they use the funds to support cancer research projects, provide transportation for patients to receive treatment, and offer free lodging for patients and their families who are traveling for treatment.
By participating in the Shamrock fundraiser, you are helping the American Cancer Society in their mission to defeat cancer and improve the lives of individuals affected by this disease.