Final answer:
CMS (Centers for Medicare & Medicaid Services) is the government agency that administers Medicare and Medicaid. Hence the correct option is B.
Step-by-step explanation:
The Centers for Medicare & Medicaid Services (CMS) is the government agency responsible for administering the Medicare and Medicaid programs in the United States. Medicare provides health coverage for individuals aged 65 and older, as well as certain younger individuals with disabilities, while Medicaid is a joint federal and state program that assists with medical costs for individuals and families with low incomes. CMS plays a crucial role in overseeing and managing these healthcare programs, ensuring their effective implementation and compliance with regulations. Hence the correct option is B.