Final answer:
The true statement is that to enroll in a Medicare Prescription Drug Plan, the consumer must live in the plan's service area. Coverage for all drugs and consistent benefits across plans are not guaranteed, and Medicare Part D is distinct from Medicare Supplement Insurance Plans.
Step-by-step explanation:
The fact about Medicare Prescription Drug Plans is that to enroll, the consumer must reside in the plan's service area. Despite a substantial expansion of Medicare in 2003, introduced to help the elderly pay for prescription drugs, not all drugs are covered, and benefits vary by plan.
Moreover, Medicare Part D is a separate entity from Medicare Supplement Insurance Plans, which is designed to help cover the out-of-pocket costs not covered by traditional Medicare.