What additional requirement must consumers meet for Medicare Part D eligibility?

The correct choice regarding Medicare Part D eligibility is that the consumer must reside in the U.S. This requirement is essential because Medicare is a federal health insurance program that is specifically designed for individuals who are 65 and older, as well as certain younger individuals with disabilities, and it is only available to those living within the United States. Therefore, an individual must be a resident of the U.S. to qualify for Medicare services, including the prescription drug coverage offered under Part D.

Other criteria for Medicare Part D eligibility include being enrolled in Medicare Part A or Part B, but the residency requirement directly relates to the ability to access these benefits. This aspect underscores the program's focus on providing healthcare coverage to individuals in the U.S. and ensures that resources are allocated to those within the jurisdiction of the program.