Final answer:
Medicare includes benefits for prescription drug costs on an outpatient basis through Medicare Part B.
Step-by-step explanation:
The correct answer is a) Medicare.
Medicare is a federal health insurance program primarily for people over the age of 65. It includes different parts, such as Medicare Part B, which covers outpatient services including physician services, medical tests, and outpatient visits. This means that Medicare includes benefits for prescription drug costs on an outpatient basis.
Medicare supplements, also known as Medigap plans, are private insurance policies that can help cover some of the costs not covered by Original Medicare (including prescription drugs), but they are not specific to outpatient prescription drug costs.