Which program serves as a cost-sharing system between federal and state governments for low-income Americans?

The correct answer is Medicaid, which is a joint federal and state program specifically designed to provide health coverage for low-income individuals and families. Established to help reduce the financial burden of healthcare on those who may not be able to afford it, Medicaid offers a wide range of health services, including hospital visits, long-term care, and preventive services.

The program's cost-sharing structure means that both federal and state governments contribute funds to support it, helping to ensure that eligible low-income Americans have access to necessary medical services. This shared funding model allows states flexibility in how they administer the program while maintaining certain federal requirements, ensuring a standardized level of care across the country.

In contrast, TRICARE is a health care program for military personnel and their families, Medicare provides health coverage primarily for individuals 65 and older or those with specific disabilities, and workers' compensation is designed to cover medical expenses and lost wages for employees injured on the job. Each of these programs has its own specific focus and eligibility criteria, which distinguishes them from Medicaid's unique role in assisting low-income populations.